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'Connor | O'CONNOR | 1 | 1 |
| O'Donnell | O'DONNELL | 2 | 2 |
| O'Hara | O'HARA | 2 | 2 |
| O'Hey | O'HEY | 2 | 2 |
| O'Neill | O'NEILL | 3 | 3 |
| Oakley | OAKLEY | 3 | 3 |
| Oakman | OAKMAN | 4 | 4 |
| Ogilby | OGILBY | 11 | 11 |
| Ogilvie | OGILVIE | 1 | 1 |
| Old | OLD | 3 | 3 |
| Olive | OLIVE | 2 | 2 |
| Oliver | OLIVER | 6 | 6 |
| Onslow | ONSLOW | 1 | 1 |
| Onslow-Graham | ONSLOW-GRAHAM | 3 | 3 |
| Oram | ORAM | 4 | 4 |
| Organ | ORGAN | 1 | 1 |
| Orme | ORME | 1 | 1 |
| Ormiston | ORMISTON | 1 | 1 |
| Orpen | ORPEN | 108 | 108 |
| ORR | ORR | 1 | 1 |
| Osborn | OSBORN | 13 | 13 |
| Osborne | OSBORNE | 4 | 4 |
| Osman | OSMAN | 1 | 1 |
| Osmond | OSMOND | 1 | 1 |
| Ovenell | OVENELL | 6 | 6 |
| Overend | OVEREND | 1 | 1 |
| Overy | OVERY | 14 | 14 |
| Owen OWEN | OWEN | 3 1 4 | 4 |
| Owens | OWENS | 1 | 1 |
| Owles | OWLES | 1 | 1 |
| Oxley | OXLEY | 1 | 1 |