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County Kilkenny
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| No. | Name | # of Families | Principal Barony |
| 1. | Walsh, Welsh, Welch | 372 | Knocktopher |
| 2. | Murphy, Morphy | 282 | Gowran |
| 3. | Brennan | 185 | Fassadinin |
| 4. | Butler | 159 | Gowran |
| 5. | Kelly | 146 | Gowran |
| 6. | Phelan | 140 | Fassadinin |
| 7. | Maher, Moher | 125 | Galmoy |
| 8. | Birne, Byrne | 111 | Gowran |
| 9. | Cody, Coady | 93 | Gowran |
| 10. | Purcell | 91 | Fassadinin |
| 11. | Shea, Shee | 91 | Kells |
| 12. | Duluny, Delaney | 88 | Galmoy |
| 13. | Ryan | 83 | Knocktopher |
| 14. | Grace | 78 | Crannagh |
| 15. | Brophy | 63 | Gowran |
| 16. | Nolan | 54 | Gowran |
| 17. | Dowling | 53 | Kilkenny City |
| 18. | Neale, Neill, O'Neil | 52 | Gowran |
| 19. | Lalor, Lawlor | 48 | Gowran |
| 20. | Donnell, O'Donnell | 46 | Gowran |
| Surname | # of Families |
| Brin | 31 |
| Keefe | 30 |
| Kevenagh | 30 |
| Farrell | 29 |
| Fitzgerald | 29 |
| Barron | 28 |
| Quiddihy | 28 |
| Bolger | 26 |
| Healy | 25 |
| Prendergast | 24 |
| Hickey | 24 |
| Coghill | 23 |
| Conway | 22 |
| Cantwell | 22 |
| Cormuke | 22 |
| Bowe | 21 |
| Hayden | 21 |
| Blanchvill | 20 |
| Howling | 20 |
| Tobin | 20 |
| Fitzpatrick | 19 |
| Duing | 19 |
| McDonagh | 19 |
| Tenane | 18 |
| Cullen | 18 |
| Bryan | 17 |
| Hennessey | 17 |
| Fleming | 17 |
| Delahunty | 16 |
| Clony | 16 |
| Aildwood | 15 |
| Archer | 15 |
| Bane | 15 |
| Dullard | 15 |
| Gerald | 14 |
| White | 14 |
| Shorthale | 14 |
| Clere | 13 |
| Clery | 13 |
| Doyle | 13 |
| Keating | 12 |
| Horogan | 11 |
| McLoughlin | 11 |
| Fanning | 10 |
| Dobbin | 10 |
| Burke | 10 |
| Joue | 10 |
| Patrick | 10 |
| Gawle | 10 |
| McShane | 9 |
| Currin | 9 |
| Muldowney | 9 |
| Roch | 9 |
| McEdmund | 9 |
| Moore | 9 |
| Smyth | 9 |
| O'Dea | 8 |
| Dalton | 8 |
| Laules | 8 |
| Heban | 8 |
| Knock | 8 |
| Dreiling | 8 |
| Conckron | 8 |
| Mulrooney | 8 |
| McDavid | 7 |
| Denn | 7 |
| Milea | 7 |
| Lorkan | 7 |
| Morish | 7 |
| McTeige | 7 |
| McPhilips | 7 |
| Archdekin | 6 |
| Brodier | 6 |
| Cragh | 6 |
| Dowley | 6 |
| Kearny | 6 |
| Loghman | 6 |
| Costigan | 6 |
| Browne | 6 |
| Britt | 6 |
| Cook | 6 |
| Rely | 6 |
| Fitzdavid | 6 |
| Cnogher | 5 |
| Mullany | 5 |
| Dunphy | 5 |
| Roe | 5 |
| McWilliam | 5 |
| Kehoe | 5 |
| Connor | 5 |
| Wall | 5 |
| Glison | 5 |
| Rooth | 5 |
| Lanagan | 5 |
| Lenan | 4 |
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