Torthaí

1. Mac Cába → McCabe ·Ó Caibe ·Ó Cápa
2. McCabe → Mac Cába ·Ó Caibe ·Ó Cápa
3. Ó Cabhail → Campbell ·Mac Cathmhaoil ·McCaul ·Caulfield
4. Ó Cabraigh → Ó Cairbre ·Carbery
5. Ó Cádáin → O'Cadden ·Ó Caidín
6. McCadam → McAdams ·McCadden
7. O'Cadden → McAdams ·Ó Cádáin ·McCadam ·O'Cadden ·Ó Caidín
8. Caddow → MacAdoo ·Mac Conduibh
9. Ó Cadhain → Ó Cadhain ·Coen ·Ó Coighin ·Ó Comhdhain ·Cowan ·Cowen ·Coyne ·Ó Cuinn ·Kyne ·Quinn
10. Ó Cadhla → Ó Cadhlaigh ·Ó Caoile ·Ó Caollaí ·Ó Caollaidhe ·Ó Ceallaigh ·Kealey ·Keally ·Kealy ·Keeley ·Keely ·O'Kelly ·Kiely ·Queally
11. Ó Cadhlaigh → Ó Cadhla ·Ó Caollaí ·Keally ·Keeley ·Kiely
12. Cadogan → Mac Aidicín ·Mac Aitigín ·Mac Aodhgáin ·Atkins ·Atkinson ·Ó Caitigín ·Cattigan ·Ó Céadagáin ·Ó Cuideagáin ·Ó Cuideagánaigh ·MacEgan ·O'Hagan ·Ó Haogáin ·McKeegan
13. Cafferkey → O'Cafferky ·McCafferty ·Ó Ceafarcaigh ·Ó Ceamharcaigh ·Mac Eachmharcaigh
14. O'Cafferky → Cafferkey ·O'Cafferky ·McCafferty ·Ó Ceafarcaigh ·Ó Ceamharcaigh ·Mac Eachmharcaigh
15. McCafferty → Cafferkey ·O'Cafferky ·McCafferty ·Ó Ceafarcaigh ·Ó Ceamharcaigh ·Mac Eachmharcaigh
16. McCaffrey → McCaffrey ·McCaffry ·Ó Cafraigh ·Mac Gafraigh ·Godfrey ·Mac Seafraidh ·Shaffrey
17. McCaffry → McCaffrey ·Ó Cafraigh ·Godfrey
18. Ó Cafraigh → McCaffrey ·McCaffry ·Ó Cafraigh ·Godfrey
19. Ó Cafua → Ó Cafua ·Ó Capua ·Ó Capuaigh ·Ó Cathbhuadha ·Ó Cathbhuadhaigh ·Ó Cathbhuaidh ·Ó Cobhthaigh ·Coffey
20. Cagney → Ó Caingne ·Ó Cuigeannaigh ·Quigney
21. Cahalane → Cahillane ·Callan ·Ó Cathaláin ·Culhane
22. McCahill → McCahill ·McCall ·Ó Cathail ·Ó Cathala ·Mac Cathmhaoil ·McCaul ·Charles ·McColl ·Mac Colla
23. Cahillane → Cahalane ·Ó Calláin ·Callan ·Ó Cathaláin ·Ó Cathláin ·Coholan ·Ó Coileáin ·Culhane
24. Cahir → Mac Caithir ·Ó Cathaoir ·O'Hehir ·Ó Heithir ·Kerr
25. Ó Caibe → Mac Cába ·McCabe
26. Ó Caidín → Ó Cádáin ·O'Cadden
27. Ó Cailín → Mac Ailín ·MacAllen ·Ó hAlmhain ·Ó Cailín ·Caimbéal ·Caimbeul ·Ó Caithlín ·Mac Callanáin ·McCallion ·Campbell ·Ó Cathmhaoil ·Ó Coileáin ·Ó Coilín ·Cullen ·Ó Hailín
28. Ó Cailpín → Mac Ailpín ·Ó Cailpín ·Ó Hailpín ·Halpen ·Halpin
29. Caimbéal → Mac Ailín ·Ó Cailín ·Caimbeul ·Mac Callanáin ·Campbell ·Ó Cathmhaoil
30. Caimbeul → Mac Ailín ·Mac Cailín ·Caimbéal ·Campbell ·Ó Cathmhaoil
31. Caine → Mac Aodháin ·Mac Aodhgáin ·Ó Caodháin ·Ó Caoidheáin ·Ó Catháin ·Egan ·MacGeehan ·O'Kane ·Keane ·Mageean
32. Ó Caingne → Cagney ·Ó Cuigeannaigh ·Quigney
33. Ó Cainnigh → Ó Coinne ·Ó Connaigh ·Ó Cunnaidh ·Cunny ·Quinny
34. Ó Cairbre → Ó Cabraigh ·Ó Cairbre ·Ó Carbaire ·Carbery
35. Ó Cairealláin → Carleton ·Carlin ·O'Carolan ·Ó Cearbhalláin ·Ó Cuirleáin
36. Cairn → Cairns ·Ó Céirín ·Ó Ciaráin ·Kearns ·Kerins
37. Cairns → Cairn ·Carey ·Carney ·Ó Carúin ·Ó Cearnaigh ·Ó Ceatharnaigh ·Ó Céirín ·Ó Ceithearnaigh ·Ó Ciaragáin ·Ó Ciaráin ·Ó Ciardha ·Ó Comair ·Ó Cómair ·Kearney ·Kearns ·Kerin ·Kerins ·Kerney ·Kieran ·Kierans ·Kiernan
38. Ó Caiside → Ó Caiside ·Ó Casaide ·O'Cassidy
39. Ó Caisín → Ó Caisín ·Cashen ·Cassen ·Cassin ·Cousins ·Hutchinson ·Mac Oisín
40. Mac Caisleáin → Mac Caislin ·McCausland
41. Mac Caislin → Mac Caisleáin ·McCausland
42. Mac Caithir → Cahir ·O'Hehir ·Ó Heithir
43. Ó Caithlín → Mac Ailín ·Allen ·Ó Cailín ·Campbell
44. Ó Caitigín → Mac Aidicín ·Mac Aitigín ·Atkins ·Atkinson ·Cadogan ·Ó Caitigín ·Cattigan ·Ó Céadagáin ·Ó Cuideagáin ·Ó Cuideagánaigh
45. Ó Calaigh → Mac Amhalghaidh ·Mac Amhlaigh ·Mac Amhlaoigh ·Mac Amhlaoimh ·McAuley ·McAuliffe ·Mac Giolla Bhuí ·Ó Calaigh ·Ó Calbhaigh ·Cally ·Calvey ·McCauley ·Cawley ·Ó Ceallabhuí ·Humphreys ·McKelvey ·Macauley
46. Ó Calbhaigh → Mac Amhalghaidh ·Mac Amhlaoimh ·Mac Giolla Bhuí ·Ó Calaigh ·Ó Calbhaigh ·Cally ·Calvey ·McCauley ·Cawley ·Ó Ceallabhuí ·Mac Ceallbhuí ·McKelvey
47. Caldwell → Mac Cathmhaoil ·Mac Conluain ·Ó Fuaruisce ·Ó Tuairisc ·Waters ·Watters
48. McCall → Cahill ·Ó Cathail ·Ó Cathala
49. O'Callaghan → O'Callaghan ·Callahan ·Calligan ·Ó Ceallacháin ·Ó Coiligeáin ·Colligan ·Culligan
50. Callahan → O'Callaghan ·Ó Ceallacháin
51. Ó Calláin → Cahillane ·Callan ·Ó Cathaláin ·Ó Cathláin ·Ó Coileáin ·Culhane
52. Callan → Cahalane ·Cahillane ·Ó Calláin ·Ó Cathaláin ·Ó Cathláin ·Coholan ·Ó Coileáin ·Collins ·Ó Cuileamhain ·Ó Cuilinn ·Ó Cuilleáin ·Ó Cuilliú ·Culhane ·Cullen
53. Ó Callanáin → Mac Ailín ·Ó Cailín ·Caimbéal ·Callanan ·Callinan ·Ó Calnáin ·Campbell ·Mac Cathmhaoil ·Ó Cuileanáin ·Ó Cuileannáin ·Cullinan ·Cullinane ·Quillinan
54. Callanan → Ó Callanáin ·Callinan ·Ó Calnáin ·Campbell ·Ó Cuileanáin ·Ó Cuileannáin ·Cullinan ·Cullinane ·Hollywood ·Quillinan
55. Calligan → Callaghan ·Ó Coiligeáin ·Colligan ·Culligan
56. Callinan → Ó Callanáin ·Callanan ·Ó Calnáin ·Ó Cuileannáin ·Cullinane
57. McCallion → Mac Ailín ·MacAllen ·Ó Cailín ·Campbell ·Ó Hailín
58. Cally → Mac Amhalghaidh ·Mac Amhlaoimh ·Ó Calaigh ·Ó Calbhaigh ·Calvey ·McCauley ·Cawley ·McKelvey
59. Ó Calnáin → Ó Callanáin ·Callanan ·Callinan ·Ó Cuileannáin ·Cullinane
60. Calvey → Mac Amhalghaidh ·Mac Amhlaoimh ·Mac Giolla Bhuí ·Ó Calaigh ·Ó Calbhaigh ·Cally ·McCauley ·Cawley ·Ó Ceallabhuí ·McKelvey
61. Campbell → Mac Ailín ·MacAllen ·Ó hAlmhain ·Ó Cabhail ·Ó Cailín ·Caimbéal ·Caimbeul ·Ó Caithlín ·Mac Callanáin ·Callanan ·McCallion ·Ó Cathmhaoil ·McCaul ·Caulfield ·Ó Hailín
62. Ó Canainn → Mac Anna ·McCann ·Mac Canna ·Cannan ·Canning ·Cannon ·Ó Ceanainn ·Ó Coincheanainn ·Ó Coinneáin ·Ó Conáin ·Mac Connáin ·McConnon ·Ó Cuinneáin ·Cunnane ·Kinnane
63. Canavan → Ó Ceannabháin ·Ó Ceanndubháin
64. McCann → Mac Anna ·Mac Canainn ·Mac Canna ·Cannan ·Cannon ·Mac Connáin ·McConnon ·McGann ·Magann
65. Mac Canna → Mac Anna ·Mac Canainn ·McCann ·Cannan ·Cannon ·Mac Connáin ·McConnon ·McGann ·Magann
66. Cannan → Mac Anna ·Mac Canainn ·McCann ·Mac Canna ·Cannon ·Mac Connáin ·McConnon
67. Canniffe → Ó Ceannduibh
68. Canning → Ó Canainn ·Cannon ·Ó Ceanainn ·Ó Coincheanainn ·Ó Coinneáin ·Ó Conáin ·Ó Cuinneáin ·Cunnane ·Kinnane
69. Cannon → Mac Anna ·Ó Canainn ·McCann ·Mac Canna ·Cannan ·Canning ·Ó Ceanainn ·Ó Coincheanainn ·Ó Coinneáin ·Ó Conáin ·Mac Connáin ·McConnon ·Ó Cuinneáin ·Cunnane ·Kinnane
70. Canny → Ó Ceannaigh ·Ó Cionnaith ·Ó Coinnigh ·Kenna ·Kenny
71. Cantwell → Ó Ceanntabhail
72. Ó Caoáin → Mac Aodháin ·Ó Caocháin ·Ó Caodháin ·Ó Caoidheáin ·Ó Caoin ·Ó Caotháin ·Ó Catháin ·Kane ·Keane
73. Ó Caobhacáin → Ó Caocháin ·Ó Caodháin ·Ó Caotháin ·Keehan
74. Ó Caobháin → Ó Caomháin ·Caomhánach ·Ó Caomhánaigh ·Cavanagh ·Ó Ciabháin ·Ó Cíobháin ·Ó Cíobhánaigh ·Kavanagh ·Kevane
75. Ó Caocháin → Mac Aodháin ·Ó Caoáin ·Ó Caobhacáin ·Ó Caocháin ·Ó Caodháin ·Ó Caoidheáin ·Ó Caoin ·Ó Caotháin ·Ó Catháin ·Kane ·Keane ·Keehan
76. Ó Caochlaí → Ó Caochlaí ·Ó Caochlaigh ·Ó Claochlaí ·Ó Claochlaoigh ·Coakley
77. Ó Caochlaigh → Ó Caochlaí ·Ó Caochlaigh ·Ó Claochlaí ·Coakley
78. Ó Caodháin → Mac Aodháin ·Mac Aodhgáin ·Caine ·Ó Caoáin ·Ó Caobhacáin ·Ó Caocháin ·Ó Caoidheáin ·Ó Caoin ·Ó Caotháin ·Ó Catháin ·Egan ·MacGeehan ·O'Kane ·Keane ·Keehan ·Mageean
79. Ó Caodhla → Ó Caola ·Ó Caollaí
80. Ó Caoidheáin → Mac Aodháin ·Caine ·Ó Caoáin ·Ó Caocháin ·Ó Caodháin ·Ó Caoidheáin ·Ó Caoin ·Ó Caotháin ·Ó Catháin ·O'Kane ·Keane
81. Ó Caoile → Ó Cadhla ·Ó Caollaí ·Keally ·Keeley ·Keely ·Kiely
82. Ó Caoileáin → Ó Caoláin ·Ó Coileáin ·Mac Fhaoláin ·Keelan
83. Ó Caoillidhe → Ó Caollaí
84. Ó Caoilte → Ó Béagáin ·Mac Giolla Choille ·Ó Coillte ·Mac Conchoille ·Ó Cuill ·Kealty ·Quilty ·Mac Uí Smál ·Small ·Woods
85. Ó Caoimh → O'Keeffe ·O'Kieve
86. Ó Caoin → Mac Aodháin ·Ó Caoáin ·Ó Caocháin ·Ó Caodháin ·Ó Caoidheáin ·Ó Caotháin ·Ó Catháin ·Kane ·Keane
87. Ó Caoindealbháin → Ó Caoinleáin ·Ó Claonáin ·Ó Coinnleáin ·Ó Conalláin ·Ó Conláin ·Conlan ·Conlon ·Connellan ·Ó Cuinnleáin ·Kenlan ·Kenlon ·Kennellan ·Kinlan ·Kinlen ·Quinlan ·Quinlivan
88. Ó Caoinigh → Ó Caona ·Ó Cianaigh ·Ó Cionnaith ·Ó Coinne ·Ó Coinnigh ·Gineá ·Mac Ginneá ·Keaney ·Keeney ·McKenna ·McKenny ·Kilkenny ·Kinney ·Kinny
89. Ó Caoinleáin → Ó Caoindealbháin ·Ó Coinnleáin ·Ó Conalláin ·Conlon ·Connellan ·Ó Cuinnleáin ·Kinlen ·Quinlan ·Quinlivan
90. Ó Caola → Ó Caodhla ·Ó Caollaí
91. Ó Caoláin → Ó Caoileáin ·Ó Coileáin ·Mac Fhaoláin ·Keelan
92. Ó Caollaí → Ó Cadhla ·Ó Cadhlaigh ·Ó Caodhla ·Ó Caoile ·Ó Caoillidhe ·Ó Caola ·Ó Caollaidhe ·Ó Ceallaigh ·Kealey ·Keally ·Kealy ·Keeley ·Keely ·O'Kelly ·Kiely ·Queally
93. Ó Caollaidhe → Ó Cadhla ·Ó Caollaí ·Keally ·Kealy ·Keely ·Kelly ·Kiely ·Queally
94. Ó Caomháin → Ó Caobháin ·Caomhánach ·Ó Caomhánaigh ·Cavanagh ·Ó Ciabháin ·Ó Cíobháin ·Ó Cíobhánaigh ·Ó Géibheannaigh ·Guiney ·Kavanagh ·Keaveny ·Kevane
95. Caomhánach → Ó Caobháin ·Ó Caomháin ·Ó Caomhánaigh ·Cavanagh ·Ó Ciabháin ·Ó Cíobháin ·Ó Cíobhánaigh ·Ó Géibheannaigh ·Guiney ·Kavanagh ·Keaveny ·Kevane
96. Ó Caomhánaigh → Ó Caobháin ·Ó Caomháin ·Caomhánach ·Cavanagh ·Ó Ciabháin ·Ó Cíobháin ·Ó Cíobhánaigh ·Ó Géibheannaigh ·Guiney ·Kavanagh ·Keaveny ·Kevane
97. Ó Caona → Ó Caoinigh ·Ó Cianaigh ·Ó Cionnaith ·Ó Coinne ·Ó Coinnigh ·Gineá ·Mac Ginneá ·Keaney ·Keeney ·McKenna ·McKenny ·Kilkenny ·Kinney ·Kinny
98. Ó Caonaigh → Ó Ceannaigh ·Ó Cionnaith ·Ó Coinne ·Ó Coinnigh ·Ó Cunnaidh ·Cunny ·Kenna ·Kenny ·Quin ·Quinny
99. Ó Caotháin → Mac Aodháin ·Ó Caoáin ·Ó Caobhacáin ·Ó Caocháin ·Ó Caodháin ·Ó Caoidheáin ·Ó Caoin ·Ó Catháin ·Kane ·Keane ·Keehan
100. Ó Cápa → Mac Cába ·McCabe
101. Caplis → Capples
102. Capples → Caplis
103. Ó Capua → Ó Cafua ·Ó Capua ·Ó Capuaigh ·Ó Cathbhuadha ·Ó Cathbhuadhaigh ·Ó Cathbhuaidh ·Ó Cobhthaigh ·Coffey
104. Ó Capuaigh → Ó Cafua ·Ó Capua ·Ó Cathbhuadhaigh ·Ó Cobhthaigh ·Coffey
105. Ó Carbaire → Ó Cairbre
106. Carbery → Ó Cabraigh ·Ó Cairbre
107. McCardle → McArdle
108. Carey → Cairns ·Ó Carráin ·Ó Carúin ·de Carún ·Ó Cearáin ·Ó Cearrúcáin ·Ó Cearrúin ·Ó Céirín ·Ó Ceiriúcháin ·Ó Ceithearnaigh ·Ó Cérúcáin ·Ó Ciaragáin ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciarba ·Ó Ciardha ·Ó Ciarmhacáin ·Ó Ciarmhaic ·Ó Ciarúcáin ·Ó Cioráin ·Ó Cíoráin ·Ó Comair ·Ó Cómair ·Ó Corráin ·Crahan ·Crehan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin ·Ervine ·Ó Heireamhóin ·Irvine ·Irwin ·Kearns ·Keary ·Keery ·Kerin ·Kerins ·Kerwick ·Kieran ·Kierane ·Kierans ·Kiernan ·Kirby
109. Carleton → Ó Cairealláin ·Carlin ·O'Carolan ·Ó Cearbhalláin ·Ó Cuirleáin
110. Carley → Mac Airligh ·Ó Faircheallaigh ·Farrell ·O'Farrelly ·Ó Fearghail ·Ó Fearghaile ·Mac Fhearghaile ·McGuirl ·Kerley
111. Carlin → Ó Cairealláin ·Carleton ·O'Carolan ·Ó Cearbhalláin ·Ó Cearbhláin ·Ó Cuirleáin ·Kerlin
112. Mac Carluis → Mac Cathail ·Corless
113. Mac Carmaig → Mac Carmaig ·Ó Cormacáin ·MacCormack ·Ó Cormaic ·Cormican ·McCormick
114. Carmody → Ó Cearmada ·Kermody
115. McCarney → Cairns ·Ó Ceárna ·Ó Cearnaigh ·Ó Ceatharnaigh ·Ó Céirín ·Ó Ceithearnaigh ·O'Kearney ·Kearns ·Kerins ·Kerney
116. O'Carolan → Ó Cairealláin ·Carleton ·Carlin ·O'Carolan ·Ó Cearbhalláin ·Ó Cearbhláin ·Ó Cuirleáin ·Kerlin
117. Carr → Ó Carra ·Ó Carraidhin ·Carry ·Ó Cárthaigh ·McCarthy ·Carty ·Mac Cathaoir ·Ceara ·Ó Cearáin ·Ó Cearr ·Mac Giolla Cheara ·Ó Corra ·Kerr
118. Ó Carra → Carr ·McCarra ·Ó Carraidhin ·Carry ·Ó Cárthaigh ·McCarthy ·Carty ·Mac Cathaoir ·Ceara ·Ó Cearáin ·Ó Cearr ·Mac Giolla Cheara ·Corr ·Ó Corra ·Ó Corraigh ·O'Curry ·Kerr ·Mac an Mhaoir ·Weir
119. Ó Carragáin → Carrigan ·Ó Corragáin ·Corrigan
120. Carragher → Farragher ·Ó Fearachair ·Ó Fearchair ·Mac Fhearchair ·Fraher
121. Ó Carraidhin → Carr ·Ó Carra ·Mac Cathaoir ·Ó Cearáin ·Ó Cearr ·Mac Giolla Cheara ·Kerr
122. Ó Carráin → Carey ·Ó Carúin ·Carún ·Ó Corráin ·Crahan ·Craine ·Crane ·Crean ·Crehan ·Crohan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin
123. Ó Carrghamhna → Mac Cathmhaoil ·Caulfield ·Ó Conghamhna ·Ó Connghamhna ·Ó Corrghamhna ·Ó Gabhann ·Gaffney ·Ó Gamhna ·Ó Gamhnáin ·Ó Gramhna ·O'Growney ·Ó Gúnáin ·Gunning
124. Mac Carrghamhne → Caulfield ·Mac Conghamhna ·Gaffney ·Ó Gamhna
125. Carrig → Carrigy ·Mac Concharraige ·Rock
126. Carrigan → Ó Carragáin ·Ó Corragáin ·Corrigan
127. Carrigy → Carrig ·Mac Concharraige ·Rock
128. O'Carroll → O'Carroll ·McCarville ·Ó Cearbhaill ·Kerville
129. McCarron → Mac Cearáin ·Mac Ciaráin
130. Carry → Carr ·Ó Carra ·Ó Cárthaigh ·McCarthy ·Carty ·Kerr
131. Ó Cartáin → Mac Artáin ·Ó Cartáin ·McCartan ·Carton
132. McCartan → Mac Artáin ·Ó Cartáin ·Carton
133. McCarte → Mac Airt
134. Carter → MacArt ·MacArthur ·Arthurs ·Mac Artúir ·Cartúr ·Ó Cuirtéir ·Ó Hairt ·Harte
135. Ó Cárthaigh → Carr ·Ó Carra ·Carry ·Ó Cárthaigh ·McCarthy ·Carty ·Kerr
136. McCarthy → Mac Airt ·Carr ·Ó Carra ·Carry ·Ó Cárthaigh ·McCarthy ·Carty ·Ó Hairt ·Ó Harta ·Harte ·Harty ·Kerr
137. Carton → Mac Artáin ·Ó Cartáin ·MacCartan
138. Cartúr → MacArt ·MacArthur ·Arthurs ·Mac Artúir ·Carter ·Ó Cuirtéir ·Ó Hairt ·Harte
139. Carty → Mac Airt ·Carr ·Ó Carra ·Carry ·Ó Cárthaigh ·McCarthy ·Ó Hairt ·Ó Harta ·Harte ·Harty ·Kerr
140. Ó Carúin → Cairns ·Carey ·Ó Carráin ·de Carún ·Ó Cearáin ·Ó Cearrúin ·Ó Céirín ·Ó Ceithearnaigh ·Ó Cérúcáin ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciardha ·Ó Ciarmhacáin ·Ó Cioráin ·Ó Cíoráin ·Ó Corráin ·Crahan ·Crehan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin ·Irvine ·Kearns ·Keary ·Kerin ·Kerins ·Kierane
141. de Carún → Carey ·Ó Carráin ·Ó Carúin ·de Carún ·Ó Cearáin ·Ó Cearrúin ·Ó Céirín ·Ó Cérúcáin ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciardha ·Ó Ciarmhacáin ·Ó Cioráin ·Ó Cíoráin ·Ó Corráin ·Crahan ·Crehan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin ·Irvine ·Keary ·Kierane
142. McCarville → O'Carroll ·McCarville ·Ó Cearbhaill ·Kerville
143. Ó Casaide → Ó Caiside ·Ó Casaide ·O'Cassidy
144. Ó Casarlaigh → Ó Casarlaigh ·Casserley ·Casserly ·Cassidy
145. O'Casey → O'Casey ·Ó Cathasaigh
146. Cashen → Ó Caisín ·Cassen ·Cassin ·Cousins ·Hutchinson ·Mac Oisín
147. Cashman → Ashman ·Ó Ciosáin ·Kissane
148. Cassen → Ó Caisín ·Cashen ·Cassin ·Mac Oisín
149. Casserley → Ó Casarlaigh ·Casserly ·Cassidy
150. Casserly → Ó Casarlaigh ·Casserley ·Cassidy
151. O'Cassidy → Ó Caiside ·Ó Casaide ·Ó Casarlaigh ·Casserley ·Casserly ·O'Cassidy
152. Cassin → Ó Caisín ·Cashen ·Cassen ·Mac Oisín
153. Mac Catailín → Kitson
154. Ó Cathail → McCahill ·McCall ·Mac Carluis ·Ó Cathail ·Ó Cathala ·Mac Cathmhaoil ·McCaul ·Charles ·McColl ·Mac Colla ·Corless
155. Ó Catháin → Mac Aodháin ·Mac Aodhgáin ·Caine ·Ó Caoáin ·Ó Caocháin ·Ó Caodháin ·Ó Caoidheáin ·Ó Caoin ·Ó Caotháin ·Ó Catháin ·Egan ·MacGeehan ·O'Kane ·Keane ·Mageean
156. Ó Cathala → Cahill ·McCall ·Ó Cathail
157. Ó Cathaláin → Cahalane ·Cahillane ·Ó Calláin ·Callan ·Coholan ·Culhane
158. Ó Cathaoir → Cahir ·Carr ·Ó Carra ·Ó Carraidhin ·Ó Cearáin ·Ó Cearr ·Mac Giolla Cheara ·Kerr
159. Ó Cathasaigh → O'Casey ·Ó Cathasaigh
160. Mac Cathbhaid → McDaeid ·Mac Dáibhid ·McDaid ·Davis ·Davitt ·Mac Déid ·Devitt ·McKevitt
161. Ó Cathbhuadha → Ó Cafua ·Ó Capua ·Ó Cathbhuadhaigh ·Ó Cathbhuaidh ·Ó Cobhthaigh ·Coffey
162. Ó Cathbhuadhaigh → Ó Cafua ·Ó Capua ·Ó Capuaigh ·Ó Cathbhuadha ·Ó Cathbhuaidh ·Ó Cobhthaigh ·Coffey
163. Ó Cathbhuaidh → Ó Cafua ·Ó Capua ·Ó Cathbhuadha ·Ó Cathbhuadhaigh ·Ó Cobhthaigh ·Coffey
164. Ó Cathláin → Cahillane ·Ó Calláin ·Callan ·Ó Coileáin ·Culhane
165. Ó Cathmhaoil → Mac Ailín ·Ó Cabhail ·McCahill ·Ó Cailín ·Caimbéal ·Caimbeul ·Caldwell ·Mac Callanáin ·Campbell ·Mac Carrghamhna ·Mac Cathail ·Ó Cathmhaoil ·McCaul ·Caulfield ·McColl ·Mac Colla ·Mac Conghamhna ·Mac Conluain ·Gaffney ·Ó Gamhna ·Ó Gamhnáin ·Ó Tuairisc ·Waters ·Watters
166. Cattigan → Mac Aidicín ·Mac Aitigín ·Atkins ·Atkinson ·Cadogan ·Ó Caitigín ·Ó Céadagáin ·Ó Cuideagáin ·Ó Cuideagánaigh
167. McCaughan → Mac Eacháin
168. McCaughey → Mac Eachaidh
169. McCaul → Ó Cabhail ·McCahill ·Campbell ·Ó Cathail ·Mac Cathmhaoil ·Caulfield ·Charles ·McColl ·Mac Colla
170. McCauley → Mac Amhalghaidh ·Mac Amhlaigh ·Mac Amhlaoigh ·Mac Amhlaoimh ·McAuley ·McAuliffe ·Ó Calaigh ·Ó Calbhaigh ·Cally ·Calvey ·McCauley ·Cawley ·Humphreys ·McKelvey ·Macauley
171. Caulfield → Ó Cabhail ·Campbell ·Ó Carrghamhna ·Mac Carrghamhne ·Mac Cathmhaoil ·McCaul ·Ó Conghamhna ·Ó Connghamhna ·Ó Corrghamhna ·Ó Gabháin ·Ó Gabhann ·Gaffney ·Ó Gamhna ·Ó Gamhnáin ·Gavin ·O'Gowan ·Ó Gramhna ·O'Growney ·Ó Gúnáin ·Gunning
172. McCausland → Mac Caisleáin ·Mac Caislin
173. Cavanagh → Ó Caobháin ·Ó Caomháin ·Caomhánach ·Ó Caomhánaigh ·Ó Ciabháin ·Ó Cíobháin ·Ó Cíobhánaigh ·Ó Géibheannaigh ·Guiney ·Kavanagh ·Keaveny ·Kevane
174. Cawley → Mac Amhalghaidh ·Mac Amhlaigh ·Mac Amhlaoigh ·Mac Amhlaoimh ·McAuley ·McAuliffe ·Ó Calaigh ·Ó Calbhaigh ·Cally ·Calvey ·McCauley ·Humphreys ·McKelvey ·Macauley
175. McCay → Mac Aodha ·Mac Aoidh ·McCoy ·Mac Gaoith ·McGee ·Ó Haodha ·Hayes ·Hewson ·McHugh ·Hughes ·McKay ·McKee ·Keyes ·McKie ·Mackey ·Magee
176. Ó Céadagáin → Mac Aidicín ·Mac Aodhgáin ·Cadogan ·Ó Caitigín ·Cattigan ·Ó Cuideagáin ·Ó Cuideagánaigh
177. Ó Céadaigh → Ó Céide ·Ó Céidigh ·Keady
178. Ó Ceafarcaigh → Cafferkey ·O'Cafferky ·McCafferty ·Ó Ceafarcaigh ·Ó Ceamharcaigh ·Mac Eachmharcaigh
179. Ó Ceallabhuí → Mac Giolla Bhuí ·Ó Calaigh ·Ó Calbhaigh ·Calvey ·Ó Ceallabhuí ·Mac Ceallbhuí ·McElwee ·McEvoy ·McIlwee ·McKelvey ·Kilawee
180. Ó Ceallacháin → O'Callaghan ·Callahan
181. Ó Ceallaigh → Ó Cadhla ·Ó Caollaí ·Ó Ceallaigh ·Kealey ·Keally ·Keeley ·O'Kelly ·Kiely
182. Mac Ceallbhuí → Mac Giolla Bhuí ·Ó Calbhaigh ·Mac Ceallabhuí ·McKelvey
183. Ó Ceamharcaigh → Cafferkey ·O'Cafferky ·McCafferty ·Ó Ceafarcaigh ·Ó Ceamharcaigh ·Mac Eachmharcaigh
184. Ó Ceanainn → Ó Canainn ·Canning ·Cannon ·Ó Ceanainn ·Ó Coincheanainn ·Ó Conáin
185. Ó Ceannabháin → Canavan ·Ó Ceannabháin ·Ó Ceanndubháin
186. Ó Ceannaigh → Canny ·Ó Caonaigh ·Ó Cionnaigh ·Ó Cionnaith ·Ó Coinne ·Ó Coinnigh ·Ó Cunnaidh ·Cunny ·Ó Ginneá ·McKenna ·Kenny ·Quin ·Quinny
187. Ó Ceanndubháin → Canavan ·Ó Ceannabháin ·Ó Ceanndubháin
188. Ó Ceannduibh → Canniffe
189. Ó Ceannfhaola → Ó Cionnfhaola ·Mac Coingheallá ·Ó Coingheallaigh ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneeley ·Connelly ·Connolly ·Kangley ·Kenneally
190. Ó Ceannfhaolaidh → Ó Cionnfhaola ·Ó Coingheallaigh ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneely ·Kenneally
191. Ó Ceanntabhail → Cantwell
192. de Ceapóg → Keapock
193. Ceara → Carr ·Ó Carra ·Ó Cearr ·Mac Giolla Cheara ·Ó Corra ·Kerr
194. Ó Cearáin → Carey ·Carr ·Ó Carra ·Ó Carraidhin ·McCarron ·Ó Carúin ·Carún ·Mac Cathaoir ·Ó Cearr ·Ó Céirín ·Ó Cérúcáin ·Mac Giolla Cheara ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciardha ·Ó Ciarmhacáin ·Ó Cioráin ·Ó Corráin ·Ó Cuirreáin ·Ó Curráin ·Irvine ·Keary ·Kerr
195. Ó Cearbhaill → O'Carroll ·McCarville ·Ó Cearbhaill ·Kerville
196. Ó Cearbháin → Ó Ciaragáin ·Ó Ciardhubháin ·Kirwan
197. Ó Cearbhalláin → Ó Cairealláin ·Carleton ·Carlin ·O'Carolan ·Ó Cearbhláin ·Ó Cuirleáin ·Kerlin
198. Ó Cearbhláin → Carlin ·O'Carolan ·Ó Cearbhalláin ·Kerlin
199. Ó Cearmada → Carmody ·Kermody
200. Ó Ceárna → Carney ·Ó Cearnaigh ·Ó Ceatharnaigh ·Ó Ceithearnaigh ·O'Kearney ·Kerney
201. Ó Cearnaigh → Cairns ·McCarney ·Ó Ceárna ·Ó Cearnaigh ·Ó Ceatharnaigh ·Ó Céirín ·Ó Ceithearnaigh ·O'Kearney ·Kearns ·Kerins ·Kerney
202. Ó Cearr → Carr ·Ó Carra ·Ó Carraidhin ·Mac Cathaoir ·Ceara ·Ó Cearáin ·Mac Giolla Cheara ·Ó Corra ·Kerr
203. Ó Cearrúcáin → Carey ·Ó Ceiriúcháin ·Ó Cérúcáin ·Ó Ciarmhacáin ·Ó Ciarmhaic ·Ó Ciarúcáin ·Irvine
204. Ó Cearrúin → Carey ·Ó Carúin ·de Carún ·Ó Ciardha
205. Ó Ceatharnaigh → Cairns ·Carney ·Ó Ceárna ·Ó Cearnaigh ·Ó Céirín ·Ó Ceithearnaigh ·O'Kearney ·Kearns ·Kerins ·Kerney
206. Ó Céide → Ó Céadaigh ·Ó Céide ·Ó Céidigh ·Keady
207. Ó Céidigh → Ó Céadaigh ·Ó Céide ·Keady
208. Ó Céileachair → Ó Céilleachair ·Kelleher ·Keller
209. Ó Céilleachair → Ó Céileachair ·Kelleher ·Keller
210. Ó Céirín → Cairn ·Cairns ·Carey ·Carney ·Ó Carúin ·Carún ·Ó Cearáin ·Ó Cearnaigh ·Ó Ceatharnaigh ·Ó Ceithearnaigh ·Ó Cérúcáin ·Ó Ciaragáin ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciardha ·Ó Ciarmhacáin ·Ó Cioráin ·Ó Comair ·Ó Cómair ·Ó Corráin ·Ó Cuirreáin ·Ó Curráin ·Irvine ·Kearney ·Kearns ·Keary ·Kerin ·Kerins ·Kerney ·Kieran ·Kierans
211. Ceirisc → Ó hÉalaí ·Ó hÉaluighthe ·Halley ·Ó Héalaigh ·Ó Héalaithe ·Ó Heallaigh ·Healy ·Ó Héilí ·Ó Héilidhe ·Ó Héiligh ·Hely ·Kerrisk
212. Ó Ceiriúcháin → Carey ·Ó Cearrúcáin ·Ó Cérúcáin ·Ó Ciarmhacáin ·Ó Ciarmhaic ·Ó Ciarúcáin ·Irvine
213. Ó Ceithearnaigh → Cairns ·Carey ·Carney ·Ó Carúin ·Ó Ceárna ·Ó Cearnaigh ·Ó Ceatharnaigh ·Ó Céirín ·Ó Ciaráin ·Ó Ciardha ·O'Kearney ·Kearns ·Kerin ·Kerins ·Kerney
214. Ó Céitig → Ó Céitín ·Ó Céitinn ·Keating
215. Ó Céitín → Ó Céitig ·Ó Céitinn ·Keating
216. Ó Céitinn → Ó Céitig ·Ó Céitín ·Ó Céitinn ·Keating
217. Ó Ceocháin → Mac Eochagáin ·Mac Eocháin ·Keoghan ·Keoghane ·Keohan ·Keohane
218. Ó Ceoinín → Ó Ceoinín ·Ciúinín ·Mac Eoinín ·Mac Eóinín ·Jennings ·Mac Seinín ·Mac Sheoinín
219. Ceorais → Bermingham ·Corish ·Mac Fheorais
220. Ceothach → Ceothánach ·Ó Ciothaigh ·Ciothóg ·Kehoe ·Keogh
221. Ceothánach → Ceothach ·Ó Ceothánaigh ·Ó Ciothaigh ·Ciothóg ·Mac Eochadha ·Mac Eochaidh ·Mac Eóthach ·Kehoe ·Keogh
222. Ó Ceothánaigh → Ceothánach ·Ó Ciothaigh ·Ciothóg ·Mac Eochadha ·Mac Eochaidh ·Mac Eóthach ·Kehoe ·Keogh
223. Ó Cérúcáin → Carey ·Ó Carúin ·Carún ·Ó Cearáin ·Ó Cearrúcáin ·Ó Céirín ·Ó Ceiriúcháin ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciarba ·Ó Ciardha ·Ó Ciarmhacáin ·Ó Ciarmhaic ·Ó Ciarúcáin ·Ó Cioráin ·Ó Círríc ·Ó Corráin ·Ó Cuirreáin ·Ó Curráin ·Irvine ·Irwin ·Keary ·Kerwick ·Kirby
224. Mac Giolla Chaoin → Kilcoyne
225. Charles → McCahill ·Ó Cathail ·McCaul
226. Mac Giolla Chatáin → McElhattin ·Hatton ·Hutton
227. Mac Giolla Cheara → Carr ·Ó Carra ·Ó Carraidhin ·Mac Cathaoir ·Ceara ·Ó Cearáin ·Ó Cearr ·Mac Giolla Cheara ·Ó Corra ·Kerr
228. Mac Giolla an Chloig → Bell
229. Mac Giolla Choda → McGillicuddy
230. Mac Giolla Choille → Ó Caoilte ·Ó Coillte ·Mac Conchoille ·Ó Cuill ·Kealty ·Quilty ·Small ·Woods
231. Mac Giolla Choinnigh → McAlinney ·McAlunny ·Mac Ealanaidh ·Heaney ·Kenny ·Kilkenny
232. Mac Giolla Chomhghaill → MacCole ·Ó Comhghaill ·McCool ·Coyle ·Ó Cumhail ·Ó Cumhaill ·Mac Dhubhghail ·Mac Dhubhghaill ·McDougald ·McDowell ·Doyle ·Ó Dubhghaill ·Mac Thuathail ·Toole ·Ó Tuathail
233. Christopher → Ó Criostóir ·Ó Criostúir
234. Mac an Chrosáin → Mac Crosáin ·Crosbie ·Crosby ·Cross ·McCrossan ·de Crúis ·Cruise
235. Ó Ciabháin → Ó Caobháin ·Ó Caomháin ·Caomhánach ·Ó Caomhánaigh ·Cavanagh ·Ó Cíobháin ·Ó Cíobhánaigh ·Kavanagh ·Kevane
236. Ó Cianaigh → Ó Caoinigh ·Ó Caona ·Ó Coinnigh ·Keaney ·Keany ·Keeney ·Kenny
237. Ó Cianáin → Keenahan ·Keenan ·McKinnon
238. Ó Ciaragáin → Cairns ·Carey ·Ó Cearbháin ·Ó Céirín ·Ó Ciaragáin ·Ó Ciaráin ·Ó Ciardhubháin ·Ó Comair ·Ó Cómair ·Comber ·Combre ·Comer ·Ó Córrain ·Kearns ·Kerin ·Kerins ·Kerrigan ·Kieran ·Kierans ·Kirwan
239. Ó Ciaraigh → Carey ·Ó Carúin ·Carún ·Ó Cearáin ·Ó Céirín ·Ó Cérúcáin ·Ó Ciaráin ·Ó Ciardha ·Ó Ciarmhacáin ·Ó Cioráin ·Ó Corráin ·Ó Cuirreáin ·Ó Curráin ·Irvine ·Keary ·Keery
240. Ó Ciaráin → Cairn ·Cairns ·Carey ·McCarron ·Ó Carúin ·Carún ·Ó Cearáin ·Ó Céirín ·Ó Ceithearnaigh ·Ó Cérúcáin ·Ó Ciaragáin ·Ó Ciaraigh ·Ó Ciardha ·Ó Ciardhubháin ·Ó Ciarmhacáin ·Ó Cioráin ·Ó Cíoráin ·Ó Comair ·Ó Cómair ·Comber ·Combre ·Comer ·Ó Corráin ·Ó Córrain ·Ó Cuirreáin ·Ó Curráin ·Irvine ·Kearns ·Keary ·Kerin ·Kerins ·Kerrigan ·Kieran ·Kierane ·Kierans ·Kiernan ·Kirwan
241. Ó Ciarba → Carey ·Ó Cérúcáin ·Ó Ciarmhacáin ·Ó Ciarmhaic ·Ó Círríc ·Ó Coirbín ·Irwin ·Kerwick ·Kirby
242. Ó Ciardha → Cairns ·Carey ·Ó Carúin ·de Carún ·Ó Cearáin ·Ó Cearrúin ·Ó Céirín ·Ó Ceithearnaigh ·Ó Cérúcáin ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciarmhacáin ·Ó Cioráin ·Ó Corráin ·Ó Cuirreáin ·Ó Curráin ·Irvine ·Kearns ·Keary ·Keery ·Kerin ·Kerins
243. Ó Ciardhubháin → Ó Cearbháin ·Ó Ciaragáin ·Ó Ciaráin ·Kirwan
244. Ó Ciarmhacáin → Carey ·Ó Carúin ·Carún ·Ó Cearáin ·Ó Cearrúcáin ·Ó Céirín ·Ó Ceiriúcháin ·Ó Cérúcáin ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciarba ·Ó Ciardha ·Ó Ciarmhaic ·Ó Ciarúcáin ·Ó Cioráin ·Ó Círríc ·Ó Corráin ·Ó Cuirreáin ·Ó Curráin ·Ervine ·Ó Heireamhóin ·Irvine ·Irwin ·Keary ·Kerwick ·Kirby
245. Ó Ciarmhaic → Carey ·Ó Cearrúcáin ·Ó Ceiriúcháin ·Ó Cérúcáin ·Ó Ciarba ·Ó Ciarmhacáin ·Ó Ciarúcáin ·Ó Círríc ·Ó Coirbín ·Irvine ·Irwin ·Kerwick ·Kirby
246. Ó Ciarúcáin → Carey ·Ó Cearrúcáin ·Ó Ceiriúcháin ·Ó Cérúcáin ·Ó Ciarmhacáin ·Ó Ciarmhaic ·Irvine
247. Ó Cibhil → Keville
248. a' Cillartráin → Ó Cilltráin ·Ó Seanainn ·Shanahan ·Shannon ·Sinan ·Sionainn
249. Ó Cillín → Ó Cillín ·Ó Coilín ·Ó Coillín ·Ó Cuilín ·Ó Cuilinn ·Cuillín ·Ó Cuilliú ·Ó Cuilliudha ·Cullen ·Killeen
250. Ó Cilltráin → a' Cillartráin ·Ó Cioltráin ·Ó Seanacháin ·Ó Seanáin ·Ó Seanainn ·Shanahan ·Shannon ·Sinan ·Sionainn
251. Ó Cinnéide → Ó Cinnéide ·O'Kennedy
252. Ó Cinnéir → Ó Cinnéir ·Ó Coinnéir ·Ó Cuinnéir ·Kinnear ·Kinner
253. Ó Cinnseala → Kinsella
254. Ó Cinnseamáin → Kingston
255. Ó Cíobháin → Ó Caobháin ·Ó Caomháin ·Caomhánach ·Ó Caomhánaigh ·Cavanagh ·Ó Ciabháin ·Ó Cíobhánaigh ·Ó Géibheannaigh ·Guiney ·Kavanagh ·Keaveny ·Kevane
256. Ó Cíobhánaigh → Ó Caobháin ·Ó Caomháin ·Caomhánach ·Ó Caomhánaigh ·Cavanagh ·Ó Ciabháin ·Ó Cíobháin ·Kavanagh ·Kevane
257. Ó Ciollabháin → Ó Báin ·Mac Giolla Bháin ·McElwaine ·Gilbane ·Kilbane ·White ·Whyte
258. Ó Cioltráin → Ó Cilltráin ·Ó Seanacháin ·Ó Seanáin ·Shannon
259. Ó Cionnaigh → Ó Ceannaigh ·Ó Cionnaith ·Ó Coinne ·Ó Coinnigh ·Ó Ginneá ·McKenna ·Kenny
260. Ó Cionnaith → Canny ·Ó Caoinigh ·Ó Caona ·Ó Caonaigh ·Ó Ceannaigh ·Ó Cionnaigh ·Ó Cionnaith ·Ó Coinne ·Ó Coinnigh ·Ó Cunnaidh ·Cunny ·Gineá ·Ó Ginneá ·Mac Ginneadha ·Keeney ·McKenna ·McKenny ·Kilkenny ·McKinney ·Kinny ·Quin ·Quinny
261. Ó Cionnfhaola → Ó Ceannfhaola ·Ó Ceannfhaolaidh ·Mac Coingheallá ·Ó Coingheallaigh ·Ó Coinghialla ·Ó Coinghiallaigh ·Ó Coinghíola ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneeley ·Conneely ·Connelly ·Ó Connollaigh ·Connolly ·Kangley ·Kenneally
262. Ó Cioráin → Carey ·Ó Carúin ·Carún ·Ó Cearáin ·Ó Céirín ·Ó Cérúcáin ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciardha ·Ó Ciarmhacáin ·Ó Corráin ·Ó Cuirreáin ·Ó Curráin ·Irvine ·Keary
263. Ó Cíoráin → Carey ·Ó Carúin ·Carún ·Ó Ciaráin ·Kierane
264. Ó Ciosáin → Ashman ·Cashman ·Kissane
265. Ciosóg → Cíosóg ·Ó Cíosóig ·Cusack ·Mac Íosóg
266. Cíosóg → Ciosóg ·Ó Cíosóig ·Cusack ·Mac Íosóg
267. Ó Cíosóig → Ciosóg ·Cíosóg ·Cusack ·Mac Íosóg
268. Ó Ciothaigh → Ceothach ·Ceothánach ·Ó Ceothánaigh ·Ó Ciothaigh ·Ciothóg ·Mac Eochadha ·Mac Eochaidh ·Mac Eóthach ·Kehoe ·Keogh
269. Ciothóg → Ceothach ·Ceothánach ·Ó Ceothánaigh ·Ó Ciothaigh ·Mac Eochadha ·Mac Eochaidh ·Mac Eóthach ·Kehoe ·Keogh
270. Ó Círríc → Ó Cérúcáin ·Ó Ciarba ·Ó Ciarmhacáin ·Ó Ciarmhaic ·Ó Coirbín ·Kerwick ·Kirby
271. Ciúinín → Ó Ceoinín ·Mac Eoinín ·Mac Eóinín ·Jennings ·Mac Seinín ·Mac Sheoinín
272. Ó Ciúrtáin → McCurtin ·Jordan ·Mac Shiúrdáin ·Mac Shiúrtáin ·Ó Siúrdáin
273. Clafferty → Mac Fhlaithbheartaigh ·Ó Flaithbheartaigh ·Mac Laithbheartaigh ·McLaverty
274. Claffey → Mac Fhlaithbheartaigh ·Mac Fhlaithimh ·Flaherty ·Ó Flaithimh ·Laffey ·Lahey ·Lahy ·Mac Laithbheartaigh ·Ó Laithimh ·Ó Laithmhe ·Ó Laochdha ·Mac Lathaigh ·McLaverty ·Leahy
275. Ó Claimhín → Clavin ·Lavin ·Swords
276. Clair → Clárach ·Clare
277. Clancy → Mac Fhlannchadha ·Ó Flannchadha
278. Ó Claochlaí → Ó Caochlaí ·Ó Caochlaigh ·Ó Claochlaí ·Ó Claochlaoigh ·Coakley
279. Ó Claochlaoigh → Ó Caochlaí ·Ó Claochlaí ·Coakley
280. Ó Claonáin → Ó Caoindealbháin ·Ó Conalláin ·Ó Conláin ·Conlan ·Conlon ·Connellan
281. Clárach → Clair ·Clare
282. Clare → Clair ·Clárach
283. Clarke → O'Cleary ·Ó Cléirigh ·O'Clery
284. Classon → Mac Neacail ·Nicholas ·McNicholl ·Nicholls ·Nicholson ·Mac Niocail ·Nixon
285. Clavin → Ó Claimhín ·Lavin ·Swords
286. McClean → Ó Coile ·Mac Conleágha ·Mac Giolla Eáin ·Mac Gilleathain ·Mac an Leágha ·McLean ·Maclean
287. Clear → de Cléir
288. O'Cleary → Clarke ·O'Cleary ·Ó Cléirigh ·O'Clery
289. de Cléir → Clear
290. Ó Cléirchín → Ó Cléireacháin ·Clerkin
291. Ó Cléireacháin → Ó Cléirchín ·Clerkin
292. Ó Cléirigh → Clarke ·O'Cleary ·O'Clery
293. McClelland → Mac Giolla Fhaoláin ·Gilliland ·Leland
294. Clements → Mac Laghmainn ·Lamont
295. MacClenaghan → Mac Fhlannagáin ·Ó Flannagáin ·Ó Léanacháin ·Ó Léineacháin ·Lenaghan ·Leneghan ·Lenehan ·Lenihan ·Linehan ·Ó Lionacháin ·Ó Loineacháin ·Ó Luineacháin
296. Clerkin → Ó Cléirchín ·Ó Cléireacháin
297. O'Clery → Clarke ·O'Cleary ·Ó Cléirigh ·O'Clery
298. Clifford → Ó Clúmháin ·Coleman ·Ó Colmáin
299. Clinten → Clinton
300. Clinton → Clinten
301. Ó Clocharta → Ó Clochartaigh ·Clogherty ·Cloherty ·Stone
302. Ó Clochartaigh → Ó Clocharta ·Ó Clochartaigh ·Clogherty ·Cloherty ·Stone
303. Ó Clochasaigh → Clohessey ·Clohessy
304. Clogherty → Ó Clocharta ·Ó Clochartaigh ·Cloherty ·Stone
305. Cloherty → Ó Clocharta ·Ó Clochartaigh ·Clogherty ·Stone
306. Clohessey → Ó Clochasaigh ·Clohessy
307. Clohessy → Ó Clochasaigh ·Clohessey
308. Cloney → Cloone ·Clooney ·Mac Cluanaigh
309. Cloonan → Ó Cluanáin ·Ó Clúnáin
310. Cloone → McAloon ·Cloney ·Clooney ·Mac Cluanaigh ·Ó Clúin ·Clune ·Mac Giolla Eoin ·McLoon ·Mac an Luain
311. Clooney → Cloney ·Cloone ·Mac Cluanaigh ·Ó Clúin ·Clune
312. McCloskey → Mac Bhloscaigh ·McCluskey
313. Mac Cluanaigh → Cloney ·Cloone ·Clooney
314. Ó Cluanáin → Cloonan ·Ó Clúnáin
315. Ó Clúin → McAloon ·Cloone ·Clooney ·Ó Clúin ·Clune ·Mac Giolla Eoin ·McLoon ·Mac an Luain
316. Ó Clúmháin → Clifford ·Coleman ·Ó Colmáin
317. Ó Clúnáin → Cloonan ·Ó Cluanáin
318. Clune → Cloone ·Clooney ·Ó Clúin
319. McCluskey → Mac Bhloscaigh ·McCloskey
320. Ó Cnáimhín → Bonar ·Boner ·Bones ·Bonner ·Bowen ·Ó Buadhacháin ·Ó Cnáimhín ·Ó Cnáimhsí ·Mac Cnáimhsighe ·Crampsie ·Kneafsey ·Ó Neabhail ·Neville ·Nevin ·Ó Nia
321. Ó Cnáimhsí → Bonar ·Boner ·Bonner ·Mac Cnáimhín ·Ó Cnáimhsí ·Ó Cnáimhsighe ·Crampsey ·Crampsie ·Kneafsey
322. Ó Cnáimhsighe → Bonar ·Boner ·Bonner ·Mac Cnáimhín ·Ó Cnáimhsí ·Ó Cnáimhsighe ·Crampsey ·Crampsie ·Kneafsey
323. Ó Cnuacháin → Ó Conmhacháin ·Ó Connacháin ·Ó Connchamháin ·Ó Connmhacháin ·Ó Connúcháin ·Ó Conúcháin ·Conway ·Ó Crucháin
324. Coady → Cody ·Cuddihy ·Ó Cuidithe ·Mac Óda
325. Coakley → Ó Caochlaí ·Ó Caochlaigh ·Ó Claochlaí ·Ó Claochlaoigh
326. Ó Cobhthaigh → Ó Cafua ·Ó Capua ·Ó Capuaigh ·Ó Cathbhuadha ·Ó Cathbhuadhaigh ·Ó Cathbhuaidh ·Ó Cobhthaigh ·Coffey ·McCooey ·Cuffe ·Mac Dhuibh ·Ó Doirnín
327. Ó Cochláin → Ó Cochláin ·Cohalan ·Coholan ·Coughlan
328. Cody → Coady ·Cuddihy ·Ó Cuidithe ·Mac Óda
329. Coen → McAloon ·Ó Cadhain ·Cohen ·Ó Comhdhain ·Ó Comhghain ·Cowan ·Cowen ·Coyne ·Ó Cuinn ·Mac Giolla Eoghain ·Mac Giolla Eoin ·McGeown ·Mac Ghilleathain ·Johnson ·McKeon ·McKeown ·McLoone ·Mac an Luain ·Malone ·Ó Maoileoin ·Owens ·Quinn
330. Coffey → Ó Cafua ·Ó Capua ·Ó Capuaigh ·Ó Cathbhuadha ·Ó Cathbhuadhaigh ·Ó Cathbhuaidh ·Ó Cobhthaigh ·McCooey ·Cuffe ·Mac Dhuibh ·Ó Doirnín
331. Ó Cógáin → Cogan ·Coogan ·Ó Cuagáin ·Mac Eochagáin ·Ó Gogáin ·Goggin ·Gugán ·Hogan ·Mac Ógáin
332. Cogan → Ó Cógáin ·Coogan ·Ó Cuagáin ·Mac Eochagáin ·Ó Gogáin ·Gogan ·Goggin ·Gugán ·Hogan ·Mac Ógáin
333. Cogley → Ó Coigil ·Ó Coigligh ·Quigley
334. Cohalan → Ó Cochláin ·Coughlan
335. Cohen → Coen ·Ó Comhghain ·Cowan ·Cowen ·Mac Eoghain ·Mac Giolla Eoin ·McKeown
336. Coholan → Cahillane ·Callan ·Ó Cathaláin ·Ó Cochláin ·Coughlan ·Culhane
337. Ó Coighin → Ó Cadhain ·Coyne ·Kyne
338. Ó Coigil → Cogley ·Ó Coigligh ·Quigley
339. Ó Coigligh → Cogley ·Ó Coigil ·Quigley
340. Ó Coile → McClean ·Mac Conleágha ·Mac Giolla Eáin ·Mac Gilleathain ·Mac an Leágha ·McLean ·Maclean
341. Ó Coileáin → Mac Ailín ·Allen ·Cahillane ·Mac Cailín ·Ó Calláin ·Callan ·Ó Caoileáin ·Ó Caoláin ·Ó Cathláin ·Ó Coileáin ·Ó Coilín ·Ó Colláin ·Collen ·Collins ·Ó Cuileamhain ·Ó Cuilinn ·Ó Cuilleáin ·Ó Cuilliú ·Ó Cuilliudha ·Culhane ·Cullen ·Mac Fhaoláin ·Keelan
342. Ó Coiléir → Collier
343. Ó Coiligeáin → Callaghan ·Calligan ·Colligan ·Culligan
344. Mac Coiligh → Mac Conchoille ·Cox
345. Ó Coilín → Mac Ailín ·Allen ·Mac Cailín ·Ó Cillín ·Ó Coileáin ·Ó Coilín ·Ó Coillín ·Ó Cuilín ·Ó Cuilinn ·Cuillín ·Ó Cuilliú ·Ó Cuilliudha ·Cullen ·Killeen
346. Ó Coillín → Ó Cillín ·Ó Coilín ·Ó Coillín ·Ó Cuilín ·Ó Cuilinn ·Cuillín ·Ó Cuilliú ·Ó Cuilliudha ·Cullen ·Killeen
347. Ó Coillte → Ó Béagáin ·Ó Caoilte ·Mac Giolla Choille ·Mac Conchoille ·Ó Cuill ·Kealty ·Quilty ·Mac Uí Smál ·Small ·Woods
348. Ó Coimín → Ó Coimín ·Ó Comáin ·Commins ·Comyn ·Ó Cuimín ·Cummins ·Hurley
349. Ó Coincheanainn → Ó Canainn ·Canning ·Cannon ·Ó Ceanainn ·Ó Coincheanainn ·Ó Conáin ·Concannon
350. Ó Coineáin → Ó Coinneáin ·Ó Conáin ·Ó Cuineáin ·Ó Cuinneáin ·Cunnane ·Guinan ·Guinane ·Guinnane ·Kinnane
351. Ó Coineoil → Ó Coineóil ·Ó Connóil ·Connole ·Ó Conóil ·Conole
352. Ó Coineóil → Mac Coineoil ·Ó Conghaile ·Ó Connóil ·Connole ·Ó Connollaigh ·Ó Conóil ·Conole
353. Mac Coingheallá → Ó Ceannfhaola ·Ó Cionnfhaola ·Ó Coingheallaigh ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneeley ·Connelly ·Connolly ·Kangley ·Kenneally
354. Ó Coingheallaigh → Ó Ceannfhaola ·Ó Ceannfhaolaidh ·Ó Cionnfhaola ·Mac Coingheallá ·Ó Coinghialla ·Ó Coinghiallaigh ·Ó Coinghíola ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneeley ·Conneely ·Connelly ·Ó Connollaigh ·Connolly ·Kangley ·Kenneally ·Kennelly
355. Ó Coinghialla → Ó Cionnfhaola ·Ó Coingheallaigh ·Ó Coinghiallaigh ·Ó Coinghíola ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneely ·Connolly ·Kenneally
356. Ó Coinghiallaigh → Ó Cionnfhaola ·Ó Coingheallaigh ·Ó Coinghialla ·Ó Coinghíola ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneely ·Connolly ·Kenneally
357. Ó Coinghíola → Ó Cionnfhaola ·Ó Coingheallaigh ·Ó Coinghialla ·Ó Coinghiallaigh ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneely ·Connolly ·Kenneally
358. Ó Coinín → Ó Coinín ·Coinnín ·Cunneen ·Rabbitte
359. Ó Coinne → Ó Cainnigh ·Ó Caoinigh ·Ó Caona ·Ó Caonaigh ·Ó Ceannaigh ·Ó Cionnaigh ·Ó Cionnaith ·Mac Coinnich ·Ó Coinnigh ·Ó Connaigh ·Coyne ·Ó Cuinn ·Ó Cunnaidh ·Cunny ·Gineá ·Ó Ginneá ·McGuinn ·Keeney ·McKenna ·McKenny ·Kilkenny ·Kinney ·Kinny ·Quin ·Quinn ·Quinney ·Quinny
360. Ó Coinneacháin → Keenaghan ·Kinahan
361. Ó Coinneáin → Ó Canainn ·Canning ·Cannon ·Ó Coineáin ·Ó Conáin ·Coonan ·Ó Cuanáin ·Ó Cuineáin ·Ó Cuinneáin ·Cunnane ·Gannon ·Ó Gionnáin ·Guinan ·Guinane ·Guinnane ·Kinnane ·Queenane
362. Ó Coinnéir → Ó Cinnéir ·Ó Cuinnéir ·Kinnear ·Kinner
363. Mac Coinneirtinne → Mac an Airchinnigh ·Ó Hoirchinnigh ·McInerney ·Kinnerk ·Mac an Oirchinnigh
364. Coinnér → Mac an Fhir ·Kinnear ·Kinner
365. Mac Coinnich → Ó Coinne ·Ó Coinnigh ·Cunny ·Kenny
366. Ó Coinnigh → Canny ·Ó Caoinigh ·Ó Caona ·Ó Caonaigh ·Ó Ceannaigh ·Ó Cianaigh ·Ó Cionnaigh ·Ó Cionnaith ·Ó Coinne ·Mac Coinnich ·Ó Coinnigh ·Ó Cuinn ·Ó Cunnaidh ·Cunny ·Ó Ginneá ·Keaney ·Keeney ·McKenna ·Kenny ·Quin ·Quinney ·Quinny
367. Coinnín → Ó Coinín ·Cunneen ·Rabbitte
368. Ó Coinnleáin → Ó Caoindealbháin ·Ó Caoinleáin ·Conlon ·Ó Cuinnleáin ·Kenlan ·Kenlon ·Kennellan ·Kinlan ·Quinlan ·Quinlivan
369. Ó Coirbín → Ó Ciarba ·Ó Ciarmhaic ·Ó Círríc ·Ó Conbá ·Ó Corbáin ·Corbett ·Kirby
370. Ó Coirnín → Ó Cúirnín ·Curneen ·Curnyn
371. Ó Coisdeala → Ó Coisdeala ·Ó Coisdealbha ·Ó Coisteala ·Ó Coistealbhaigh ·Costello ·Costelloe
372. Ó Coisdealbha → Ó Coisdeala ·Ó Coisdealbha ·Ó Coisteala ·Ó Coistealbhaigh ·Costello ·Costelloe
373. Ó Coisteala → Ó Coisdeala ·Ó Coisdealbha ·Ó Coisteala ·Ó Coistealbhaigh ·Costello ·Costelloe
374. Ó Coistealbhaigh → Ó Coisdeala ·Ó Coisdealbha ·Ó Coisteala ·Costello ·Costelloe
375. Ó Coitir → Ó Coitir ·Ó Coitirigh ·Cotter ·Mac Oitir
376. Ó Coitirigh → Ó Coitir ·Cotter ·Mac Oitir
377. MacCole → Mac Giolla Chomhghaill ·MacCole ·Ó Comhghaill ·McCool ·Coyle ·Ó Cumhail ·Ó Cumhaill ·Mac Dhubhghail ·Mac Dhubhghaill ·McDougald ·MacDougall ·McDowell ·Doyle ·Ó Dubhghaill
378. Coleman → Clifford ·Ó Clúmháin ·Ó Colmáin
379. Colfer → Mac Oilifir
380. McColgan → McColgan ·Culligan
381. Colhoun → Ó Cuileamhain ·Ó Cuilinn ·Cullen
382. McColl → McCahill ·Mac Cathail ·Mac Cathmhaoil ·McCaul ·McColl ·Ó Colla ·Ó Collaigh ·Colley ·Colly ·McCullagh ·Ó Cullaigh ·McCullough ·Cully
383. Ó Colla → McCahill ·Mac Cathail ·Mac Cathmhaoil ·McCaul ·McColl ·Ó Colla ·Ó Collaigh ·Colley ·Colly ·McCullagh ·Ó Cullaigh ·McCullough ·Cully
384. Ó Collaigh → McColl ·Ó Colla ·McCullagh ·Ó Cullaigh ·McCullough ·Cully
385. Ó Colláin → Ó Coileáin ·Collen ·Collins ·Ó Cuilleáin ·Cullen
386. McCollam → Ó Coluim ·Colum
387. Ó Collaráin → Mac Allmhúráin ·Colleran ·Ó Hallmhúráin ·O'Halloran
388. Ó Collata → Culloty
389. Collen → Ó Coileáin ·Ó Colláin ·Collins ·Ó Cuilleáin ·Cullen
390. Colleneler → Collinder
391. Colleran → Mac Allmhúráin ·Ó Collaráin ·Ó Hallmhúráin ·O'Halloran
392. Colley → Coll ·Ó Colla ·McCullagh ·Ó Cullaigh ·McCullough ·Cully
393. Collier → Ó Coiléir
394. Colligan → Callaghan ·Calligan ·Ó Coiligeáin ·Culligan
395. Collinder → Colleneler
396. Collins → Callan ·Ó Coileáin ·Ó Colláin ·Collen ·Ó Cuileamhain ·Ó Cuilinn ·Ó Cuilleáin ·Ó Cuilliú ·Cullen
397. Colly → Coll ·Ó Colla ·McCullagh ·Ó Cullaigh ·Cully
398. Ó Colmáin → Clifford ·Ó Clúmháin ·Coleman
399. Colreavy → Mac Cúilriabhaigh ·Mac Giolla Riabhaigh
400. Ó Coluim → McCollam ·Ó Coluim ·Colum
401. Colum → McCollam ·Ó Coluim
402. Ó Comáin → Ó Coimín ·Commins ·Comyn ·Ó Cuimín ·Cummins ·Herlihy ·Hurley ·Ó Hurthuile ·Morley ·Ó Muirthile ·Ó Murthuile
403. Ó Comair → Cairns ·Carey ·Ó Céirín ·Ó Ciaragáin ·Ó Ciaráin ·Ó Cómair ·Comber ·Comer ·Kearns ·Kerin ·Kerins ·Kieran ·Kierans
404. Ó Cómair → Cairns ·Carey ·Ó Céirín ·Ó Ciaragáin ·Ó Ciaráin ·Ó Comair ·Comber ·Combre ·Comer ·Kearns ·Kerin ·Kerins ·Kerrigan ·Kieran ·Kierans ·Kirwan
405. Comartún → Comerford ·Mac Cumascaigh
406. Comber → Ó Ciaragáin ·Ó Ciaráin ·Ó Comair ·Ó Cómair ·Combre ·Comer ·Ó Córrain ·Kerrigan ·Kirwan
407. Combre → Ó Ciaragáin ·Ó Ciaráin ·Ó Cómair ·Comber ·Ó Córrain ·Kerrigan ·Kirwan
408. Comer → Ó Ciaragáin ·Ó Ciaráin ·Ó Comair ·Ó Cómair ·Comber
409. Comerford → Comartún ·Mac Cumascaigh
410. Ó Comhdhain → Ó Cadhain ·Coen ·Ó Comhghain ·Cowan ·Cowen ·Coyne ·Ó Cuinn ·Quinn
411. Ó Comhghaill → Mac Giolla Chomhghaill ·MacCole ·Ó Comhghaill ·McCool ·Coyle ·Ó Cumhail ·Ó Cumhaill ·Mac Dhubhghail ·Mac Dhubhghaill ·McDougald ·MacDougall ·McDowell ·Doyle ·Ó Dubhghaill ·Mac Thuathail ·Toole ·Ó Tuathail
412. Ó Comhghain → Coen ·Cohen ·Ó Comhdhain ·Cowan ·Cowen ·Coyne ·Mac Eoghain ·Mac Giolla Eoin ·McKeown
413. Ó Comhraí → Corr ·Ó Corra ·Ó Corraidh ·Corry ·Ó Curraidh ·O'Curry ·Mac Gothraidh
414. McComiskey → MacComisky ·McCumiskey ·McCumisky
415. MacComisky → McComiskey ·MacComisky ·McCumiskey ·McCumisky
416. Commins → Ó Coimín ·Ó Comáin ·Comyn ·Ó Cuimín ·Cummins ·Hurley
417. Mac Comní → Mee ·Ó Miadha ·Ó Miadhaigh ·Ó Mídhia ·MacNamee
418. Comyn → Ó Coimín ·Ó Comáin ·Commins ·Ó Cuimín ·Cummins
419. Mac Conacha → MacConachy ·McConaghey ·Connaghy ·Mac Dhonnchadha ·Mac Dhonnchaidh
420. MacConachy → Mac Conacha ·McConaghey ·Connaghy ·Mac Dhonnchadha ·Mac Dhonnchaidh
421. Mac Conagail → Mac Congail ·Conneely ·McGonagle ·McNealy
422. McConaghey → Mac Conacha ·MacConachy ·Connaghy ·Mac Dhonnchadha ·Mac Dhonnchaidh
423. McConaghy → Denison ·Mac Dhonnchadha ·MacDonagh ·Ó Donnchadha ·O'Donoghue ·Duncan ·Dunphy
424. Ó Conaill → Ó Conaill ·O'Connell
425. Ó Conáin → Ó Canainn ·Canning ·Cannon ·Ó Ceanainn ·Ó Coincheanainn ·Ó Coineáin ·Ó Coinneáin ·Ó Cuineáin ·Ó Cuinneáin ·Cunnane ·Guinan ·Guinane ·Guinnane ·Kinnane
426. Ó Conaire → Connery ·Ó Conra ·Ó Conrach ·Ó Conraoi ·Conree ·Conroy ·Conry ·Ó Conthra ·Ó Contra ·Ó Hannraoi ·King ·Mac Con Rí ·Mac an Ríogh
427. Ó Conalláin → Ó Caoindealbháin ·Ó Caoinleáin ·Ó Claonáin ·Ó Conláin ·Conlan ·Conlon ·Connellan ·Kinlen ·Quinlan ·Quinlivan
428. Mac Conallta → McAnulty ·Nalty ·Nolty ·Nulty ·Mac Con Ultaigh
429. Mac Conámha → Adams ·Mac Giolla an Átha ·Ó Fóráin ·Foran ·Forde ·Ó Fuaráin ·Ó Fuartháin ·Mac Giollarnáth
430. Ó Conaola → Ó Ceannfhaola ·Ó Ceannfhaolaidh ·Ó Cionnfhaola ·Mac Coingheallá ·Ó Coingheallaigh ·Ó Coinghialla ·Ó Coinghiallaigh ·Ó Coinghíola ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneeley ·Conneely ·Connelly ·Ó Connollaigh ·Connolly ·Kangley ·Kenneally ·Kennelly
431. Mac Conaonaigh → Bird ·Mac an Éanaigh ·McEnaney ·McEneaney ·Ó Héanacháin ·Ó Héineacháin
432. Ó Conaráin → Condren ·Condron
433. Conaty → Ó Connachtaigh
434. Ó Conbá → Ó Coirbín ·Ó Corbáin ·Corbett
435. Ó Conbhá → Ó Conbhuí ·Conboy ·Ó Conmhuí ·Conway ·Corbett
436. Conbhae → Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuidhe ·Conboy ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connmhacháin ·Ó Connmhaigh ·Ó Conúcháin ·Convey ·Conway ·Cunningham
437. Ó Conbhaí → Conbhae ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuí ·Ó Conbhuidhe ·Conboy ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connmhacháin ·Ó Connmhaí ·Ó Connmhaigh ·Ó Conúcháin ·Convey ·Conway ·Cunningham
438. Ó Conbhaigh → Conbhae ·Ó Conbhaí ·Ó Conbhuaidh ·Ó Conbhuidhe ·Conboy ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connmhacháin ·Ó Connmhaigh ·Ó Conúcháin ·Convey ·Conway ·Cunningham
439. Ó Conbhuaidh → Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuidhe ·Conboy ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connmhacháin ·Ó Connmhaigh ·Ó Conúcháin ·Convey ·Conway ·Cunningham
440. Ó Conbhuí → Ó Conbhá ·Ó Conbhaí ·Ó Conbhuí ·Conboy ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Conmhuí ·Ó Connmhaí ·Ó Connmhaigh ·Conway
441. Ó Conbhuidhe → Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Conboy ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connmhacháin ·Ó Connmhaigh ·Ó Conúcháin ·Convey ·Conway ·Cunningham
442. Conboy → Ó Conbhá ·Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuí ·Ó Conbhuidhe ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Conmhuí ·Ó Connacháin ·Ó Connbhuí ·Ó Connmhacháin ·Ó Connmhaigh ·Ó Conúcháin ·Convey ·Conway ·Corbett ·Cunningham
443. Concannon → Ó Coincheanainn
444. Mac Concharraige → Carrig ·Carrigy ·Rock
445. Ó Conchobhair → Ó Conchubhair ·Ó Conchúir ·O'Connor ·Connors
446. Mac Conchoille → Ó Caoilte ·Mac Giolla Choille ·Mac Coiligh ·Ó Coillte ·Cox ·Ó Cuill ·Quilty ·Woods
447. Mac Conchradha → Crowe
448. Ó Conchubhair → Ó Conchobhair ·Ó Conchúir ·O'Connor ·Connors
449. Ó Conchúir → Ó Conchobhair ·Ó Conchubhair ·O'Connor ·Connors
450. Condon → Condún ·Ó Cúndúin ·Cúndún ·Ó Cúnúin ·Cúnún
451. Condren → Ó Conaráin ·Condron
452. Condron → Ó Conaráin ·Condren
453. Mac Conduibh → MacAdoo ·Caddow
454. Condún → Condon ·Ó Cúndúin ·Cúndún ·Ó Cúnúin ·Cúnún
455. Conefrey → Mac Confraoich
456. Ó Confhaola → Ó Ceannfhaola ·Ó Ceannfhaolaidh ·Ó Cionnfhaola ·Mac Coingheallá ·Ó Coingheallaigh ·Ó Coinghialla ·Ó Coinghiallaigh ·Ó Coinghíola ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneeley ·Conneely ·Connelly ·Ó Connollaigh ·Connolly ·Kangley ·Kenneally
457. Mac Confraoich → Conefrey
458. Mac Congail → Mac Conagail ·Conneely ·McGonagle ·Mac Maonagail ·Mac Maongail ·Monagle ·McNealy
459. Ó Conghaile → Ó Ceannfhaola ·Ó Ceannfhaolaidh ·Ó Cionnfhaola ·Ó Coineóil ·Mac Coingheallá ·Ó Coingheallaigh ·Ó Coinghialla ·Ó Coinghiallaigh ·Ó Coinghíola ·Ó Conaola ·Ó Confhaola ·Mac Conleágha ·Conneeley ·Conneely ·Connelly ·Connole ·Ó Connollaigh ·Connolly ·Conole ·Fennelly ·Mac Fhionnghaile ·Mac Fhionnlaoich ·Finlay ·Ó Fionnghaile ·Ó Fionnlaoich ·McGinley ·McIneely ·Kangley ·Kenneally ·McKinley ·Mac an Leagha ·McNealy ·MacNeela ·McNeely
460. Ó Conghamhna → Ó Carrghamhna ·Mac Carrghamhne ·Mac Cathmhaoil ·Caulfield ·Ó Conghamhna ·Gaffney ·Ó Gamhna ·Ó Gamhnáin ·Growney ·Gunning
461. Ó Conláin → Ó Caoindealbháin ·Ó Claonáin ·Ó Conalláin ·Conlan ·Conlon ·Connellan
462. Conlan → Ó Caoindealbháin ·Ó Claonáin ·Ó Conalláin ·Ó Conláin ·Conlon ·Connellan
463. Mac Conleágha → McClean ·Ó Coile ·Mac Conghaile ·Mac Giolla Eáin ·Fennelly ·Mac Fhionnghaile ·Mac Fhionnlaoich ·Finlay ·Ó Fionnghaile ·Ó Fionnlaoich ·Mac Gilleathain ·McGinley ·McKinley ·Mac an Leagha ·Mac an Leágha ·McLean ·Maclean
464. Conlon → Ó Caoindealbháin ·Ó Caoinleáin ·Ó Claonáin ·Ó Coinnleáin ·Ó Conalláin ·Ó Conláin ·Conlan ·Connellan ·Ó Cuinnleáin ·Kinlen ·Quinlan ·Quinlivan
465. Mac Conluain → Caldwell ·Mac Cathmhaoil ·Ó Tuairisc ·Waters ·Watters
466. Mac Conmara → McNamara
467. Conmee → Mac Conmí ·Mee ·Mac na Midhe ·McNamee
468. Ó Conmhacháin → Ó Cnuacháin ·Ó Connacháin ·Ó Connchamháin ·Ó Connmhacháin ·Ó Connúcháin ·Ó Conúcháin ·Conway ·Ó Crucháin
469. Ó Conmhaí → Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuí ·Ó Conbhuidhe ·Conboy ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connmhacháin ·Ó Connmhaí ·Ó Connmhaigh ·Ó Conúcháin ·Convey ·Conway ·Cunningham
470. Ó Conmhaídhe → Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuí ·Ó Conbhuidhe ·Conboy ·Ó Conmhaí ·Ó Connacháin ·Ó Connbhuí ·Ó Connmhacháin ·Ó Connmhaí ·Ó Connmhaigh ·Ó Conúcháin ·Convey ·Conway ·Cunningham
471. Mac Conmhaoil → Conwell
472. Ó Conmhuí → Ó Conbhá ·Ó Conbhuí ·Conboy ·Conway
473. Mac Conmí → Conmee ·Mee ·Mac na Midhe ·McNamee
474. Conmy → Cormy
475. Ó Connacháin → Ó Cnuacháin ·Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuidhe ·Conboy ·Ó Conmhacháin ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connchamháin ·Ó Connmhacháin ·Ó Connmhaigh ·Ó Connúcháin ·Ó Conúcháin ·Convey ·Conway ·Ó Crucháin ·Ó Cuinneacháin ·Ó Cuinneagáin ·Cunningham
476. Ó Connachtaigh → Conaty
477. Ó Connachtáin → Connachton ·Connaughton
478. Connachton → Ó Connachtáin ·Connaughton
479. MacConnaghy → Mac Conacha ·MacConachy ·McConaghey ·Mac Dhonnchadha ·Mac Dhonnchaidh ·McDonagh ·Mac Donncha ·Ó Donnchadha ·O'Donoghue ·McDunphy
480. Ó Connaigh → Ó Cainnigh ·Ó Coinne ·Ó Cunnaidh ·Cunny ·Quinny
481. Mac Connáin → Mac Anna ·Mac Canainn ·McCann ·Mac Canna ·Cannan ·Cannon ·McConnon
482. Mac Connallta → Nalty ·Nolty ·Nulty
483. Connaughton → Ó Connachtáin ·Connachton
484. Ó Connbhuí → Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuidhe ·Conboy ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connmhacháin ·Ó Connmhaigh ·Ó Conúcháin ·Convey ·Conway ·Cunningham
485. Ó Connchamháin → Ó Cnuacháin ·Ó Conmhacháin ·Ó Connacháin ·Ó Connmhacháin ·Ó Connúcháin ·Ó Conúcháin ·Conway ·Ó Crucháin
486. Conneeley → Ó Ceannfhaola ·Ó Cionnfhaola ·Mac Coingheallá ·Ó Coingheallaigh ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneely ·Connelly ·Connolly ·Kangley ·Kenneally ·Kennelly
487. Conneely → Ó Ceannfhaolaidh ·Ó Cionnfhaola ·Ó Coingheallaigh ·Ó Coinghialla ·Ó Coinghiallaigh ·Ó Coinghíola ·Mac Conagail ·Ó Conaola ·Ó Confhaola ·Mac Congail ·Ó Conghaile ·Conneeley ·Ó Connollaigh ·Connolly ·McGonagle ·Kenneally ·McNealy
488. O'Connell → Ó Conaill ·O'Connell
489. Connellan → Ó Caoindealbháin ·Ó Caoinleáin ·Ó Claonáin ·Ó Conalláin ·Ó Conláin ·Conlan ·Conlon ·Kinlen ·Quinlan ·Quinlivan
490. Connelly → Ó Ceannfhaola ·Ó Cionnfhaola ·Mac Coingheallá ·Ó Coingheallaigh ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneeley ·Connolly ·Kangley ·Kenneally
491. Connery → Ó Conaire ·Ó Conra ·Conrach ·Ó Conraoi ·Conree ·Conroy ·Conry ·Ó Conthra ·Ó Hannraoi ·King ·Mac Con Rí ·Mac an Ríogh
492. Ó Connghamhna → Ó Carrghamhna ·Caulfield ·Ó Connghamhna ·Ó Corrghamhna ·Ó Gabhann ·Ó Gamhna ·Ó Gamhnáin ·Ó Gúnáin ·Gunning
493. Ó Connmhacháin → Ó Cnuacháin ·Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuidhe ·Conboy ·Ó Conmhacháin ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connchamháin ·Ó Connmhaigh ·Ó Connúcháin ·Ó Conúcháin ·Convey ·Conway ·Ó Cruacháin ·Ó Crucháin ·Cunningham
494. Ó Connmhaí → Ó Conbhaí ·Ó Conbhuí ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connmhaigh ·Conway
495. Ó Connmhaigh → Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuí ·Ó Conbhuidhe ·Conboy ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connmhacháin ·Ó Connmhaí ·Ó Connmhaigh ·Ó Conúcháin ·Convey ·Conway ·Cunningham
496. Ó Connóil → Ó Coineoil ·Ó Coineóil ·Ó Connóil ·Mac Connól ·Connole ·Ó Conóil ·Conole
497. Mac Connól → Mac Connóil ·Ó Conóil ·Conole
498. Connole → Ó Coineoil ·Ó Coineóil ·Ó Conghaile ·Ó Connóil ·Ó Connollaigh ·Ó Conóil ·Conole
499. Ó Connollaigh → Ó Cionnfhaola ·Ó Coineóil ·Ó Coingheallaigh ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneely ·Connole ·Connolly ·Conole ·Kenneally
500. Connolly → Ó Ceannfhaola ·Ó Cionnfhaola ·Mac Coingheallá ·Ó Coingheallaigh ·Ó Coinghialla ·Ó Coinghiallaigh ·Ó Coinghíola ·Ó Conaola ·Ó Confhaola ·Ó Conghaile ·Conneeley ·Conneely ·Connelly ·Ó Connollaigh ·Kangley ·Kenneally ·Kennelly
501. McConnon → Mac Anna ·Mac Canainn ·McCann ·Mac Canna ·Cannan ·Cannon ·Mac Connáin
502. O'Connor → Ó Conchobhair ·Ó Conchubhair ·Ó Conchúir ·O'Connor ·Connors ·Gearty ·Geraghty ·Harrington ·Harty ·Heraghty ·Heraty ·Herity ·Ó Hoireachtaigh ·Mac Oireachtaigh
503. Connors → Ó Conchobhair ·Ó Conchubhair ·Ó Conchúir ·O'Connor
504. Ó Connúcháin → Ó Cnuacháin ·Ó Conmhacháin ·Ó Connacháin ·Ó Connchamháin ·Ó Connmhacháin ·Ó Conúcháin ·Conway ·Ó Crucháin
505. Ó Conóil → Ó Coineoil ·Ó Coineóil ·Ó Connóil ·Mac Connól ·Connole ·Ó Conóil ·Conole
506. Conole → Ó Coineoil ·Ó Coineóil ·Ó Conghaile ·Ó Connóil ·Mac Connól ·Connole ·Ó Connollaigh ·Ó Conóil
507. Ó Conra → Ó Conaire ·Connery ·Ó Conrach ·Ó Conraoi ·Conroy ·Conry ·Ó Conthra ·Ó Contra ·King ·Mac an Rí
508. Ó Conrach → Ó Conaire ·Connery ·Ó Conra ·Ó Conrach ·Ó Conraoi ·Conroy ·Conry ·Ó Conthra ·Ó Contra ·King ·Mac an Rí
509. Ó Conraoi → Mac Anraoi ·Ó Conaire ·Connery ·Ó Conra ·Conrach ·Ó Conraoi ·Conree ·Conroy ·Conry ·Ó Conthra ·Mac Énrí ·Mac Fhinn ·MacGing ·Ó Hannraoi ·Ó Hanraoi ·Henry ·King ·Mac Con Rí ·Mac an Ríogh
510. Conree → Ó Conaire ·Connery ·Ó Conraoi ·Conroy ·Ó Hannraoi ·King ·Mac Con Rí ·Mac an Ríogh
511. Conroy → Ó Conaire ·Connery ·Ó Conra ·Conrach ·Ó Conraoi ·Conree ·Conry ·Ó Conthra ·Ó Hannraoi ·King ·Mac Con Rí ·Mac an Ríogh
512. Conry → Ó Conaire ·Connery ·Ó Conra ·Ó Conrach ·Ó Conraoi ·Conroy ·Ó Conthra ·Ó Contra ·King ·Mac an Rí
513. Ó Consaidín → Ó Consaidín ·Considine
514. Considine → Ó Consaidín
515. Ó Conthra → Ó Conaire ·Connery ·Ó Conra ·Conrach ·Ó Conraoi ·Conroy ·Conry ·King ·Mac an Rí
516. Ó Contra → Ó Conaire ·Ó Conra ·Ó Conrach ·Conry
517. Ó Conúcháin → Ó Cnuacháin ·Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuidhe ·Conboy ·Ó Conmhacháin ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connchamháin ·Ó Connmhacháin ·Ó Connmhaigh ·Ó Connúcháin ·Convey ·Conway ·Ó Crucháin ·Cunningham
518. Convey → Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuidhe ·Conboy ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connmhacháin ·Ó Connmhaigh ·Ó Conúcháin ·Conway ·Cunningham
519. Conway → Ó Cnuacháin ·Ó Conbhá ·Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuí ·Ó Conbhuidhe ·Conboy ·Ó Conmhacháin ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Conmhuí ·Ó Connacháin ·Ó Connbhuí ·Ó Connchamháin ·Ó Connmhacháin ·Ó Connmhaí ·Ó Connmhaigh ·Ó Connúcháin ·Ó Conúcháin ·Convey ·Ó Crucháin ·Cunningham
520. Conwell → Mac Conmhaoil
521. McCooey → Ó Cobhthaigh ·Coffey
522. Coogan → Ó Cógáin ·Cogan ·Ó Cuagáin ·Mac Eochagáin ·Ó Gogáin ·Goggin ·Gugán
523. Cook → Cooke ·Ó Cuacach ·Mac Cuag ·Mac Cuaig
524. Cooke → Cook ·Ó Cuacach ·Mac Cuag ·Mac Cuaig
525. McCool → Mac Giolla Chomhghaill ·MacCole ·Ó Comhghaill ·Coyle ·Mac Cumhail ·Mac Dhubhghaill ·MacDougall ·MacDowell ·Mac Thuathail ·Toal ·Tohall ·Toole ·Ó Tuathail ·Ó Tuathaill
526. Coolahan → Ó Cúlacháin ·Houlihan ·Mac Uallacháin
527. Coonan → Ó Coinneáin ·Ó Cuanáin
528. Cooney → Ó Cuana ·Ó Cuanaigh ·Ó Cuanna ·Ó Cuannaigh
529. Ó Corbáin → Ó Coirbín ·Ó Conbá ·Corbett ·Kirby
530. Corbett → Ó Coirbín ·Ó Conbá ·Ó Conbhá ·Conboy ·Ó Corbáin ·Kirby
531. Ó Corcora → Corkery ·Corr ·Ó Corra ·Corry ·O'Curry
532. Ó Corcoráin → Ó Corcoráin ·Corcoran
533. Corcoran → Ó Corcoráin
534. Corduff → Ó Corrdhuibh
535. Corish → Bermingham ·Berminghim ·Birmingham ·Ceorais ·Mac Fheorais
536. Corkery → Ó Corcora
537. McCorkill → Mac Thorcail
538. Ó Corlaigh → Mac Thoirdhealbhaigh
539. Corless → Mac Carluis ·Mac Cathail
540. McCorley → McCorley ·McCurley ·Mac Fhearghaile ·Kerley ·Mac Oralaigh ·Ó Tarlaigh ·Terry ·Mac Thoirdhealbhaigh ·Ó Toirbhealaigh ·Torrens ·Traoin ·Turley
541. Ó Cormacáin → Mac Carmaig ·MacCormack ·Ó Cormaic ·Cormican ·McCormick
542. MacCormack → Mac Carmaig ·Ó Cormacáin ·MacCormack ·Ó Cormaic ·Cormican ·McCormick
543. Ó Cormaic → Mac Carmaig ·Ó Cormacáin ·MacCormack ·Ó Cormaic ·Cormican ·McCormick
544. Cormican → Mac Carmaig ·Ó Cormacáin ·MacCormack ·Ó Cormaic ·McCormick
545. McCormick → Mac Carmaig ·Ó Cormacáin ·MacCormack ·Ó Cormaic ·Cormican
546. Cormy → Conmy
547. Corr → Ó Carra ·Ó Comhraí ·Ó Corcora ·Ó Corra ·Ó Corraigh ·Corry ·Ó Curraidh ·Currie ·O'Curry ·Mac Gothraidh ·Mac an Mhaoir ·Weir
548. Ó Corra → Carr ·Ó Carra ·Ceara ·Ó Cearr ·Mac Giolla Cheara ·Ó Comhraí ·Ó Corcora ·Corr ·Ó Corra ·Ó Corraigh ·Corry ·Ó Curraidh ·Currie ·O'Curry ·Mac Gothraidh ·Kerr ·Mac an Mhaoir ·Weir
549. Ó Corracháin → Ó Corragáin ·Corrigan
550. Ó Corradáin → Corridan
551. Ó Corragáin → Ó Carragáin ·Carrigan ·Ó Corracháin ·Corrigan
552. Ó Corraidh → Ó Comhraí ·Corry ·Ó Curraidh ·O'Curry
553. Ó Corraidhin → Ó Corráin ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin
554. Ó Corraigh → Ó Carra ·Corr ·Ó Corra ·O'Curry ·Mac an Mhaoir ·Weir
555. Ó Corráin → Carey ·Ó Carráin ·Ó Carúin ·Carún ·Ó Cearáin ·Ó Céirín ·Ó Cérúcáin ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciardha ·Ó Ciarmhacáin ·Ó Cioráin ·Ó Corraidhin ·Crahan ·Craine ·Crane ·Crean ·Crehan ·Crohan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin ·Irvine ·Keary
556. Ó Córrain → Ciaragáin ·Ó Ciaráin ·Comber ·Combre ·Kerrigan ·Kirwan
557. Ó Corrdhuibh → Corduff
558. Ó Corrghamhna → Ó Carrghamhna ·Caulfield ·Ó Connghamhna ·Ó Corrghamhna ·Ó Gabhann ·Ó Gamhna ·Ó Gamhnáin ·Ó Gúnáin ·Gunning
559. Corridan → Ó Corradáin
560. Corrigan → Ó Carragáin ·Carrigan ·Ó Corracháin ·Ó Corragáin
561. McCorry → Ó Comhraí ·Ó Corcora ·Corr ·Ó Corra ·Ó Corraidh ·Ó Curraidh ·Currie ·O'Curry ·Mac Gothraidh
562. Ó Cosáin → McFadden ·Fadian ·Fagan ·Padden ·Patterson ·Patton ·Peyton ·Mac Pháidín
563. Ó Coscair → Ó Coscair ·Ó Cosgair ·Cosgrave ·Cosgrove ·McCusker ·Mac Oscair ·Mac Osgair
564. Ó Cosgair → Ó Coscair ·Ó Cosgair ·Cosgrave ·Cosgrove ·McCusker ·Mac Oscair ·Mac Osgair
565. Cosgrave → Ó Coscair ·Ó Cosgair ·Cosgrove ·McCusker ·Mac Oscair ·Mac Osgair
566. Cosgrove → Ó Coscair ·Ó Cosgair ·Cosgrave ·McCusker ·Mac Oscair ·Mac Osgair
567. Ó Costagáin → Ó Costagáin ·Costigan ·Mac Oistigín
568. Costello → Ó Coisdeala ·Ó Coisdealbha ·Ó Coisteala ·Ó Coistealbhaigh ·Costelloe
569. Costelloe → Ó Coisdeala ·Ó Coisdealbha ·Ó Coisteala ·Ó Coistealbhaigh ·Costello
570. Costigan → Ó Costagáin ·Mac Oistigín
571. Cotter → Ó Coitir ·Ó Coitirigh ·Mac Oitir
572. Coughlan → Ó Cochláin ·Cohalan ·Coholan
573. Counihan → Ó Cuanacháin
574. de Courcey → de Courcey ·de Cúrsa
575. Cournane → McCourt ·Courtenay ·Courtney ·Ó Cuarnáin ·Mac Cuarta ·Ó Cúrnáin ·Curnane
576. McCourt → Cournane ·Courtenay ·Courtney ·Ó Cuarnáin ·Mac Cuarta ·Ó Cúrnáin ·Curnane ·Mac Dhorchaidh ·McGourty
577. Courtenay → Cournane ·McCourt ·Courtney ·Ó Cuarnáin ·Mac Cuarta ·Ó Cúrnáin ·Curnane
578. Courtney → Cournane ·McCourt ·Courtenay ·Ó Cuarnáin ·Mac Cuarta ·Ó Cúrnáin ·Curnane
579. Cousins → Ó Caisín ·Cashen ·Hession ·Ó Hoisín ·Hutchinson ·Mac Oisín
580. Cowan → McAloon ·Ó Cadhain ·Coen ·Cohen ·Ó Comhdhain ·Ó Comhghain ·Cowen ·Coyne ·Ó Cuinn ·Mac Giolla Eoghain ·Mac Giolla Eoin ·McGeown ·Mac Ghilleathain ·Johnson ·McKeon ·McKeown ·McLoone ·Mac an Luain ·Malone ·Ó Maoileoin ·Owens ·Quinn
581. Cowely → Cowley
582. Cowen → McAloon ·Ó Cadhain ·Coen ·Cohen ·Ó Comhdhain ·Ó Comhghain ·Cowan ·Coyne ·Ó Cuinn ·Mac Giolla Eoghain ·Mac Giolla Eoin ·Mac Ghilleathain ·McKeown ·McLoone ·Mac an Luain ·Malone ·Ó Maoileoin ·Quinn
583. Cowley → Cowely
584. Cox → Mac Coiligh ·Mac Conchoille ·Woods
585. McCoy → Mac Aodha ·Mac Aoidh ·McCay ·Mac Gaoith ·McGee ·Ó Haodha ·Hayes ·Hewson ·McHugh ·Hughes ·McKay ·McKee ·Keyes ·McKie ·Mackey ·Magee
586. Coyle → Mac Giolla Chomhghaill ·Cole ·Ó Comhghaill ·McCool ·Ó Cumhail ·Ó Cumhaill ·Mac Dhubhghail ·Mac Dhubhghaill ·McDougald ·MacDougall ·McDowell ·Doyle ·Ó Dubhghaill
587. Coyne → Ó Cadhain ·Coen ·Ó Coighin ·Ó Coinne ·Ó Comhdhain ·Ó Comhghain ·Cowan ·Cowen ·Ó Cuinn ·Mac Eoghain ·Mac Giolla Eoin ·McGeown ·McGuinn ·Johnson ·Kenny ·McKeon ·McKeown ·Kyne ·Owens ·Quin ·Quinn
588. Ó Crábháin → Ó Crábháin ·Ó Cráibhín ·Ó Craobháin ·Craven
589. McCracken → Grattan ·Mac Neachtain ·Mac Reachtain
590. Crahan → Carey ·Ó Carráin ·Ó Carúin ·Carún ·Ó Corráin ·Craine ·Crane ·Crean ·Crehan ·Crohan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin
591. Ó Cráibhín → Ó Crábháin ·Ó Craobháin ·Craven
592. Ó Craidheáin → Ó Croidheáin ·Ó Croithín ·Cryan
593. Craig → Ó Creag
594. Craine → Ó Carráin ·Ó Corráin ·Crahan ·Crane ·Crean ·Crehan ·Crohan
595. Ó Craith → Ó Craith ·McCrea ·Mac Grádha ·Ó Graith ·McGrath ·Macrea ·Magrath ·Mac Raith ·Mac Rath
596. Crampsey → Boner ·Ó Cnáimhsí ·Ó Cnáimhsighe ·Crampsie ·Kneafsey
597. Crampsie → Bonar ·Boner ·Bonner ·Mac Cnáimhín ·Ó Cnáimhsí ·Ó Cnáimhsighe ·Crampsey ·Kneafsey
598. Crane → Ó Carráin ·Ó Corráin ·Crahan ·Craine ·Crean ·Crehan ·Crohan
599. Crangle → Cranley ·Cranly ·Ó Crónallaigh ·Cronelly ·Ó Crónghaile ·Cronly
600. Cranley → Crangle ·Cranly ·Ó Crónallaigh ·Cronelly ·Ó Crónghaile ·Cronly
601. Cranly → Crangle ·Cranley ·Ó Crónallaigh ·Cronelly ·Ó Crónghaile ·Cronly
602. McCrann → McRann
603. Ó Craobháin → Ó Crábháin ·Ó Cráibhín ·Ó Craobháin ·Craven
604. Craven → Ó Crábháin ·Ó Cráibhín ·Ó Craobháin
605. Crawley → Crolly ·O'Crowley ·Ó Cruadhlaoich
606. McCrea → Ó Craith ·Mac Grádha ·Ó Graith ·McGrath ·Macrea ·Magrath ·Mac Raith
607. Mac Créadaigh → McCready
608. McCready → Mac Créadaigh
609. Ó Creag → Craig ·Ó Creag
610. Ó Creagáin → Ó Créagáin ·Cregan ·Ó Criagáin ·Ó Críogáin ·Mac Riagáin
611. Ó Créagáin → Ó Creagáin ·Cregan ·Ó Criagáin ·Ó Críogáin ·Mac Riagáin
612. Crean → Ó Carráin ·Ó Corráin ·Crahan ·Craine ·Crane ·Crehan ·Crohan
613. McCreanor → Mac Thréinfhir ·Trainor ·Traynor ·Treanor ·Tréinfhear
614. Creed → Creedon ·Ó Críodáin
615. Creedon → Creed ·Ó Críodáin
616. Cregan → Ó Creagáin ·Ó Créagáin ·Ó Criagáin ·Ó Críogáin ·Mac Riagáin
617. Crehan → Carey ·Ó Carráin ·Ó Carúin ·Carún ·Ó Corráin ·Crahan ·Craine ·Crane ·Crean ·Crohan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin
618. Ó Creimín → Cremin ·Ó Crimín ·Crimmins
619. Cremin → Ó Creimín ·Ó Crimín ·Crimmins
620. Ó Criagáin → Ó Creagáin ·Ó Créagáin ·Cregan ·Ó Críogáin ·Mac Riagáin
621. Cribbons → Robinson ·Mac Roibín
622. Crilly → Mac Raghallaigh
623. Ó Crimín → Ó Creimín ·Cremin ·Crimmins
624. Crimmins → Ó Creimín ·Cremin ·Ó Crimín
625. Crinion → Ó Críonáin
626. Ó Críodáin → Creed ·Creedon ·Ó Críodáin
627. Ó Críogáin → Ó Creagáin ·Ó Créagáin ·Cregan ·Ó Criagáin ·Mac Riagáin
628. Ó Criomhthain → Ó Criomhthain ·O'Crohan
629. Ó Críonáin → Crinion ·Ó Críonáin
630. Ó Criostóir → Christopher ·Ó Criostóir ·Ó Criostúir
631. Ó Criostúir → Christopher ·Ó Criostóir ·Ó Criostúir
632. Croal → Ó Cródhal ·Cróil
633. Ó Cródhal → Croal ·Cróil
634. O'Crohan → Ó Carráin ·Ó Corráin ·Crahan ·Craine ·Crane ·Crean ·Crehan ·Ó Criomhthain ·O'Crohan
635. Ó Croidheáin → Ó Craidheáin ·Ó Croithín ·Cryan
636. Cróil → Croal ·Ó Cródhal
637. Ó Cróinín → Cronin
638. Ó Croithín → Ó Craidheáin ·Ó Croidheáin ·Cryan
639. Crolly → Crawley ·O'Crowley ·Ó Cruadhlaoich
640. Ó Crónallaigh → Crangle ·Cranley ·Cranly ·Cronelly ·Ó Crónghaile ·Cronly
641. Cronelly → Crangle ·Cranley ·Cranly ·Ó Crónallaigh ·Ó Crónghaile ·Cronly
642. Ó Crónghaile → Crangle ·Cranley ·Cranly ·Ó Crónallaigh ·Cronelly ·Cronly
643. Cronin → Ó Cróinín
644. Cronly → Crangle ·Cranley ·Cranly ·Ó Crónallaigh ·Cronelly ·Ó Crónghaile
645. McCrory → McGrory ·Rodgers ·Rogers ·Rogerson ·McRory ·Mac Ruaidhrí
646. Mac Crosáin → Mac an Chrosáin ·Crosbie ·Crosby ·Cross ·McCrossan ·de Crúis ·Cruise
647. Crosbie → Mac an Chrosáin ·Mac Crosáin ·Crosby ·Cross ·McCrossan ·de Crúis ·Cruise
648. Crosby → Mac an Chrosáin ·Mac Crosáin ·Crosbie
649. Cross → Mac an Chrosáin ·Mac Crosáin ·Crosbie ·McCrossan ·de Crúis ·Cruise
650. McCrossan → Mac an Chrosáin ·Mac Crosáin ·Crosbie ·Cross
651. Crota → Ó Crotaigh ·Crotty
652. Ó Crotaigh → Crota ·Crotty
653. Crotty → Crota ·Ó Crotaigh
654. Crowe → Mac Conchradha
655. O'Crowley → Crawley ·Crolly ·O'Crowley ·Ó Cruadhlaoich
656. Ó Cruacháin → Ó Connmhacháin
657. Ó Cruadhlaoich → Crawley ·Crolly ·O'Crowley
658. Ó Crucháin → Ó Cnuacháin ·Ó Conmhacháin ·Ó Connacháin ·Ó Connchamháin ·Ó Connmhacháin ·Ó Connúcháin ·Ó Conúcháin ·Conway
659. McCrudden → McCrudden ·Mac Rodáin ·Roden
660. de Crúis → Mac an Chrosáin ·Mac Crosáin ·Crosbie ·Cross ·Cruise
661. Cruise → Mac an Chrosáin ·Mac Crosáin ·Crosbie ·Cross ·de Crúis
662. Mac Cruitín → Mac Artáin ·Mac Curtáin ·MacCurtin ·Jordan ·Mac Shiúrtáin
663. Cryan → Ó Craidheáin ·Ó Croidheáin ·Ó Croithín
664. Ó Cuacach → Cook ·Cooke ·Mac Cuag ·Mac Cuaig
665. Mac Cuag → Cook ·Cooke ·Ó Cuacach ·Mac Cuaig
666. Ó Cuagáin → Ó Cógáin ·Cogan ·Coogan ·Mac Eochagáin ·Ó Gogáin ·Goggin ·Gugán
667. Mac Cuaig → Cook ·Cooke ·Ó Cuacach ·Mac Cuag
668. Ó Cualáin → Ó Cualáin ·Ó Cúláin ·Mac Fhualáin ·Folan ·Foley ·Ó Fualáin ·Mac Searraigh ·Mac Thuathaláin ·Ó Tolain ·Tolan ·Tolin ·Toolan ·Toolin ·Toolis ·Ó Tuathaláin ·Ó Tuathlainn
669. Ó Cuana → Cooney ·Ó Cuanaigh ·Ó Cuanna ·Ó Cuannaigh
670. Ó Cuanacháin → Counihan
671. Ó Cuanaigh → Cooney ·Ó Cuana ·Ó Cuanna ·Ó Cuannaigh
672. Ó Cuanáin → Ó Coinneáin ·Coonan
673. Ó Cuanna → Cooney ·Ó Cuana ·Ó Cuanaigh ·Ó Cuannaigh
674. Ó Cuannaigh → Cooney ·Ó Cuana ·Ó Cuanaigh ·Ó Cuanna
675. Ó Cuarnáin → Cournane ·McCourt ·Courtenay ·Courtney ·Mac Cuarta ·Ó Cúrnáin ·Curnane
676. Mac Cuarta → Cournane ·McCourt ·Courtenay ·Courtney ·Ó Cuarnáin ·Ó Cúrnáin ·Curnane ·Mac Dhorchaidh ·McGourty
677. Cuddihy → Coady ·Cody ·Ó Cuidithe ·Mac Óda
678. Cuffe → Ó Cobhthaigh ·Coffey ·Mac Dhuibh ·Ó Doirnín
679. Ó Cuideagáin → Mac Aidicín ·Mac Aodhgáin ·Cadogan ·Ó Caitigín ·Cattigan ·Ó Céadagáin ·Ó Cuideagánaigh
680. Ó Cuideagánaigh → Mac Aidicín ·Cadogan ·Ó Caitigín ·Cattigan ·Ó Céadagáin ·Ó Cuideagáin
681. Ó Cuidithe → Coady ·Cody ·Cuddihy ·Ó Cuidithe ·Mac Óda
682. Ó Cuigeannaigh → Cagney ·Ó Caingne ·Quigney
683. Ó Cuileamhain → Callan ·Ó Coileáin ·Colhoun ·Collins ·Ó Cuilinn ·Ó Cuilleáin ·Ó Cuilliú ·Cullen
684. Ó Cuileanáin → Ó Callanáin ·Callanan ·Ó Cuileanáin ·Ó Cuileannáin ·Cullinan ·Cullinane ·Hollywood ·Quillinan
685. Ó Cuileannáin → Ó Callanáin ·Callanan ·Callinan ·Ó Calnáin ·Ó Cuileanáin ·Ó Cuileannáin ·Cullinan ·Cullinane ·Quillinan
686. Ó Cuilín → Ó Cillín ·Ó Coilín ·Ó Coillín ·Ó Cuilinn ·Cuillín ·Ó Cuilliú ·Ó Cuilliudha ·Cullen ·Killeen
687. Ó Cuilinn → Callan ·Ó Cillín ·Ó Coileáin ·Ó Coilín ·Ó Coillín ·Colhoun ·Collins ·Ó Cuileamhain ·Ó Cuilín ·Ó Cuilleáin ·Cuillín ·Ó Cuilliú ·Ó Cuilliudha ·Cullen ·Killeen
688. Ó Cuill → Ó Caoilte ·Mac Giolla Choille ·Ó Coillte ·Mac Conchoille ·Quill ·Quilty ·Woods
689. Ó Cuilleáin → Callan ·Ó Coileáin ·Ó Colláin ·Collen ·Collins ·Ó Cuileamhain ·Ó Cuilinn ·Ó Cuilliú ·Ó Cuilliudha ·Cullen ·McQuillan ·McQuillen ·Mac Uidhlinn
690. Cuillín → Ó Cillín ·Ó Coilín ·Ó Coillín ·Ó Cuilín ·Ó Cuilinn ·Ó Cuilliú ·Ó Cuilliudha ·Cullen ·Killeen
691. Ó Cuilliú → Callan ·Ó Cillín ·Ó Coileáin ·Ó Coilín ·Ó Coillín ·Collins ·Ó Cuileamhain ·Ó Cuilín ·Ó Cuilinn ·Ó Cuilleáin ·Cuillín ·Ó Cuilliudha ·Cullen ·Killeen
692. Ó Cuilliudha → Ó Cillín ·Ó Coileáin ·Ó Coilín ·Ó Coillín ·Ó Cuilín ·Ó Cuilinn ·Ó Cuilleáin ·Cuillín ·Ó Cuilliú ·Cullen ·Killeen
693. Mac Cúilriabhaigh → Colreavy ·Mac Giolla Riabhaigh
694. Ó Cuimilín → Timlin ·Ó Tuimlin
695. Ó Cuimín → Ó Coimín ·Ó Comáin ·Commins ·Comyn ·Cummins ·Hurley
696. Ó Cuineáin → Ó Coineáin ·Ó Coinneáin ·Ó Conáin ·Ó Cuineáin ·Ó Cuinneáin ·Cunnane ·Guinan ·Guinane ·Guinnane ·Kinnane
697. Ó Cuinn → Ó Cadhain ·Coen ·Ó Coinne ·Ó Coinnigh ·Ó Comhdhain ·Cowan ·Cowen ·Coyne ·Ó Cuinn ·Ó Cunnaidh ·Cunny ·McGuinn ·Gunn ·Gwynn ·Kenny ·McQueen ·Quin ·Quinn ·Quinney
698. Ó Cuinneacháin → Ó Connacháin ·Ó Cuinneagáin ·Cunningham
699. Ó Cuinneagáin → Ó Connacháin ·Ó Cuinneacháin ·Ó Cuinneagáin ·Cunningham ·Kinaghan ·Kinnegan
700. Ó Cuinneáin → Ó Canainn ·Canning ·Cannon ·Ó Coineáin ·Ó Coinneáin ·Ó Conáin ·Ó Cuineáin ·Cunnane ·Gannon ·Ó Gionnáin ·Guinan ·Guinane ·Guinnane ·Kinnane ·Queenane
701. Ó Cuinnéir → Ó Cinnéir ·Ó Coinnéir ·Kinnear ·Kinner
702. Ó Cuinnleáin → Ó Caoindealbháin ·Ó Caoinleáin ·Ó Coinnleáin ·Conlon ·Kenlan ·Kenlon ·Kennellan ·Kinlan ·Quinlan ·Quinlivan
703. Ó Cuirc → Ó Cuirc ·McGuirk ·McGurk ·Kirke ·Quirke
704. Ó Cuireáin → Carey ·Ó Carráin ·Ó Carúin ·Carún ·Ó Corraidhin ·Ó Corráin ·Crahan ·Crehan ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin
705. Ó Cuirleáin → Ó Cairealláin ·Carleton ·Carlin ·O'Carolan ·Ó Cearbhalláin
706. Ó Cúirnín → Ó Coirnín ·Curneen ·Curnyn
707. Ó Cuirreáin → Carey ·Ó Carráin ·Ó Carúin ·Carún ·Ó Cearáin ·Ó Céirín ·Ó Cérúcáin ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciardha ·Ó Ciarmhacáin ·Ó Cioráin ·Ó Corraidhin ·Ó Corráin ·Crahan ·Crehan ·Ó Cuireáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin ·Irvine ·Keary
708. Ó Cuirrín → Carey ·Ó Carráin ·Ó Carúin ·Carún ·Ó Corraidhin ·Ó Corráin ·Crahan ·Crehan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin
709. Ó Cuirtéir → Mac Artúir ·Carter ·Cartúr
710. Cuirtéis → Curtis
711. Ó Cúise → Ó Heodhasa ·Ó Heodhusa ·Hosae ·O'Hussey
712. Ó Cúlacháin → Coolahan ·Houlihan ·Mac Uallacháin
713. Ó Cúláin → Ó Cualáin ·Mac Fhualáin ·Folan ·Foley ·Ó Fualáin ·Mac Searraigh
714. Culhane → Cahalane ·Cahillane ·Ó Calláin ·Callan ·Ó Cathaláin ·Ó Cathláin ·Coholan ·Ó Coileáin
715. McCullagh → McColl ·Ó Colla ·Ó Collaigh ·Colley ·Colly ·Ó Cullaigh ·McCullough ·Cully
716. Ó Cullaigh → McColl ·Ó Colla ·Ó Collaigh ·Colley ·Colly ·McCullagh ·McCullough ·Cully
717. Cullen → Mac Ailín ·Allen ·Mac Cailín ·Callan ·Ó Cillín ·Ó Coileáin ·Ó Coilín ·Ó Coillín ·Colhoun ·Ó Colláin ·Collen ·Collins ·Ó Cuileamhain ·Ó Cuilín ·Ó Cuilinn ·Ó Cuilleáin ·Cuillín ·Ó Cuilliú ·Ó Cuilliudha ·Killeen
718. Culligan → Callaghan ·Calligan ·Ó Coiligeáin ·McColgan ·Colligan
719. Cullinan → Ó Callanáin ·Callanan ·Ó Cuileanáin ·Ó Cuileannáin ·Cullinane
720. Cullinane → Ó Callanáin ·Callanan ·Callinan ·Ó Calnáin ·Ó Cuileanáin ·Ó Cuileannáin ·Cullinan ·Hollywood ·Quillinan
721. Culloty → Ó Collata
722. McCullough → McColl ·Ó Colla ·Ó Collaigh ·Colley ·McCullagh ·Ó Cullaigh ·Cully
723. Cully → McColl ·Ó Colla ·Ó Collaigh ·Colley ·Colly ·McCullagh ·Ó Cullaigh ·McCullough
724. Mac Cumascaigh → Comartún ·Comerford ·Cumiskey ·Cumisky ·Cummiskey ·Cummisky
725. Ó Cumhail → Mac Giolla Chomhghaill ·Cole ·Ó Comhghaill ·McCool ·Coyle ·Ó Cumhaill ·Mac Dhubhghaill ·McDougald ·McDowell ·Doyle ·Ó Dubhghaill ·Mac Thuathail ·Toole ·Ó Tuathail
726. Ó Cumhaill → Mac Giolla Chomhghaill ·Cole ·Ó Comhghaill ·Coyle ·Mac Cumhail ·Mac Dhubhghaill
727. McCumiskey → McComiskey ·MacComisky ·Mac Cumascaigh ·McCumisky ·Cummiskey ·Cummisky
728. McCumisky → McComiskey ·MacComisky ·Mac Cumascaigh ·McCumiskey ·McCumisky ·Cummiskey ·Cummisky
729. Cummins → Ó Coimín ·Ó Comáin ·Commins ·Comyn ·Ó Cuimín ·Hurley
730. Cummiskey → Mac Cumascaigh ·Cumiskey ·Cumisky ·Cummisky
731. Cummisky → Mac Cumascaigh ·Cumiskey ·Cumisky ·Cummiskey
732. Ó Cúndúin → Condon ·Condún ·Cúndún ·Ó Cúnúin ·Cúnún
733. Cúndún → Condon ·Condún ·Ó Cúndúin ·Ó Cúnúin ·Cúnún
734. Ó Cunnaidh → Ó Cainnigh ·Ó Caonaigh ·Ó Ceannaigh ·Ó Cionnaith ·Ó Coinne ·Ó Coinnigh ·Ó Connaigh ·Ó Cuinn ·Ó Cunnaidh ·Cunny ·Kenna ·Kenny ·Quin ·Quinney ·Quinny
735. Cunnane → Ó Canainn ·Canning ·Cannon ·Ó Coineáin ·Ó Coinneáin ·Ó Conáin ·Ó Cuineáin ·Ó Cuinneáin ·Guinan ·Guinane ·Guinnane ·Kinnane
736. Cunneen → Ó Coinín ·Coinnín ·Rabbitte
737. Cunningham → Conbhae ·Ó Conbhaí ·Ó Conbhaigh ·Ó Conbhuaidh ·Ó Conbhuidhe ·Conboy ·Ó Conmhaí ·Ó Conmhaídhe ·Ó Connacháin ·Ó Connbhuí ·Ó Connmhacháin ·Ó Connmhaigh ·Ó Conúcháin ·Convey ·Conway ·Ó Cuinneacháin ·Ó Cuinneagáin ·Kinaghan ·Kinnegan
738. Cunny → Ó Cainnigh ·Ó Caonaigh ·Ó Ceannaigh ·Ó Cionnaith ·Ó Coinne ·Mac Coinnich ·Ó Coinnigh ·Ó Connaigh ·Ó Cuinn ·Ó Cunnaidh ·Kenna ·Kenny ·Quin ·Quinney ·Quinny
739. Ó Cúnúin → Condon ·Condún ·Ó Cúndúin ·Cúndún ·Cúnún
740. Cúnún → Condon ·Condún ·Ó Cúndúin ·Cúndún ·Ó Cúnúin
741. Mac Curdaigh → McCurdy ·Mac Mhuircheartaigh
742. McCurdy → Mac Curdaigh ·Mac Mhuircheartaigh ·Moriarty ·Ó Muircheartaigh
743. McCurley → McCorley ·McCurley ·Mac Fhearghaile ·Kerley ·Mac Oralaigh ·Ó Tarlaigh ·Terry ·Mac Thoirbhealaigh ·Mac Thoirdhealbhaigh ·Ó Toirbhealaigh ·Torrens ·Traoin ·Triall ·Turley ·Tyrrell
744. Ó Cúrnáin → Cournane ·McCourt ·Courtenay ·Courtney ·Ó Cuarnáin ·Mac Cuarta ·Curnane
745. Curnane → Cournane ·McCourt ·Courtenay ·Courtney ·Ó Cuarnáin ·Mac Cuarta ·Ó Cúrnáin
746. Curneen → Ó Coirnín ·Ó Cúirnín ·Curnyn
747. Curnyn → Ó Coirnín ·Ó Cúirnín ·Curneen
748. Ó Curraidh → Ó Comhraí ·Corr ·Ó Corra ·Ó Corraidh ·Corry ·Ó Curraidh ·Currie ·O'Curry
749. Ó Curraidhin → Carey ·Ó Carráin ·Ó Carúin ·Carún ·Ó Corraidhin ·Ó Corráin ·Crahan ·Crehan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curráin ·Curran ·Ó Curraoin
750. Ó Curráin → Carey ·Ó Carráin ·Ó Carúin ·Carún ·Ó Cearáin ·Ó Céirín ·Ó Cérúcáin ·Ó Ciaraigh ·Ó Ciaráin ·Ó Ciardha ·Ó Ciarmhacáin ·Ó Cioráin ·Ó Corraidhin ·Ó Corráin ·Crahan ·Crehan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Curran ·Ó Curraoin ·Irvine ·Keary
751. Curran → Carey ·Ó Carráin ·Ó Carúin ·Carún ·Ó Corraidhin ·Ó Corráin ·Crahan ·Crehan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Ó Curraoin
752. Ó Curraoin → Carey ·Ó Carráin ·Ó Carúin ·Carún ·Ó Corraidhin ·Ó Corráin ·Crahan ·Crehan ·Ó Cuireáin ·Ó Cuirreáin ·Ó Cuirrín ·Ó Curraidhin ·Ó Curráin ·Curran ·Ó Curraoin
753. Currie → Corr ·Ó Corra ·Corry ·Ó Curraidh ·Curry
754. O'Curry → Ó Carra ·Ó Comhraí ·Ó Corcora ·Corr ·Ó Corra ·Ó Corraidh ·Ó Corraigh ·Corry ·Ó Curraidh ·Currie ·O'Curry ·Mac Gothraidh ·Mac an Mhaoir ·Weir
755. de Cúrsa → de Courcey
756. Mac Curtáin → Mac Artáin ·Mac Cruitín ·MacCurtin ·Jordan ·Mac Shiúrtáin
757. McCurtin → Mac Artáin ·Ó Ciúrtáin ·Mac Cruitín ·Mac Curtáin ·McCurtin ·Jordan ·Mac Shiúrdáin ·Mac Shiúrtáin ·Ó Siúrdáin
758. Curtis → Cuirtéis
759. Cusack → Ciosóg ·Cíosóg ·Ó Cíosóig ·Mac Íosóg
760. McCusker → Ó Coscair ·Mac Cosgair ·Cosgrave ·Cosgrove ·Mac Oscair ·Mac Osgair