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 | ? | ( | 1 | Æ | … | None
| Surname | Individuals | ||
|---|---|---|---|
| O'Brien | O'BRIEN | 7 | 7 |
| O'Connor | O'CONNOR | 2 | 2 |
| O'halloran | O'HALLORAN | 1 | 1 |
| O'hara | O'HARA | 1 | 1 |
| O'Hehir | O'HEHIR | 3 | 3 |
| O'Meara | O'MEARA | 16 | 16 |
| O'neil | O'NEIL | 1 | 1 |
| O'Rorke | O'RORKE | 2 | 2 |
| Oakes | OAKES | 1 | 1 |
| Oats | OATS | 1 | 1 |
| Oats-Hamblin | OATS-HAMBLIN | 1 | 1 |
| Obelensky | OBELENSKY | 1 | 1 |
| Occhipinti | OCCHIPINTI | 2 | 2 |
| Ogilvy | OGILVY | 3 | 3 |
| Oilly | OILLY | 1 | 1 |
| Oldenburg | OLDENBURG | 20 | 20 |
| Oliver | OLIVER | 4 | 4 |
| Ollen | OLLEN | 1 | 1 |
| Ollinger | OLLINGER | 1 | 1 |
| Olsen | OLSEN | 5 | 5 |
| Olson | OLSON | 6 | 6 |
| Onley | ONLEY | 1 | 1 |
| Opie | OPIE | 1 | 1 |
| Orchard | ORCHARD | 1 | 1 |
| Orléans | ORLÉANS | 1 | 1 |
| Orr | ORR | 15 | 15 |
| Orsini | ORSINI | 9 | 9 |
| Osborne | OSBORNE | 4 | 4 |
| Ostojic | OSTOJIC | 5 | 5 |
| Otten | OTTEN | 3 | 3 |
| Ovchinnikov | OVCHINNIKOV | 1 | 1 |
| overseas") | OVERSEAS") | 1 | 1 |
| Owain | OWAIN | 1 | 1 |
| Owen | OWEN | 1 | 1 |