Individuals
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ( | None
| Surname | Individuals |
|---|---|
| O Cathan | 1 |
| O?Brien | 1 |
| O' Cathan | 1 |
| O'Brien | 5 |
| O'Brien Kinzler | 1 |
| O'Cathan, King In Ulster | 2 |
| O'Neill | 2 |
| OCahan Ocahan | 3 2 5 |
| OCathain | 4 |
| OCathan | 4 |
| Of Formaiel | 1 |
| Olafsdatter | 1 |
| Oliphant | 1 |
| ONeill | 2 |
| Ostrowski | 1 |