| 1 | Caen | 1 |
| 2 | Cain | 252 |
| 3 | Caine | 22 |
| 4 | Caines | 10 |
| 5 | Cains | 7 |
| 6 | Cane | 9 |
| 7 | Coen | 5 |
| 8 | Cohan | 2 |
| 9 | Cohen | 5 |
| 10 | Cowan | 6 |
| 11 | Cowen | 3 |
| 12 | Coyne | 12 |
| 13 | Henry | 12 |
| 14 | Kain | 15 |
| 15 | Kaine | 5 |
| 16 | Kane | 137 |
| 17 | Kean | 11 |
| 18 | Keane | 66 |
| 19 | Keen | 15 |
| 20 | Keene | 18 |
| 21 | Keohane | 0 |
| 22 | Keyne | 0 |
| 23 | Keynes | 5 |
| 24 | Koen | 2 |
| 25 | McCahan | 1 |
| 26 | McCain | 17 |
| 27 | McCloskey | 7 |
| 28 | McCluskey | 8 |
| 29 | McHenry | 8 |
| 30 | McKain | 4 |
| 31 | McKane | 6 |
| 32 | McKean | 11 |
| 33 | Ó Catháin | 0 |
| 34 | O'Cain | 3 |
| 35 | O'Kane | 15 |
| 36 | O'Keane | 1 |