| Select a different initial letter: A B C D E F G H I J K L M N P Q R S T U V W X Y Z | No Surname | Go to home page | |
| O'hara | Mary O'hara | |
| O'r | 'Einon [Porth] O'r (d 1191) | |
| Oakenfull | >Joan Oakenfull | |
| Oakes | >Tim Oakes | 'Willa Oakes (b 1998) |
| Oates | >Augustus Richard Claud Oates (b 1898) | 'Peggy Oates (b 1927) |
| Oddingsella | >William de Oddingsella | |
| Ogston | >Kenneth Ogston | |
| Oldham | >Margaret Oldham | |
| Oliver | >Richard George Oliver | >Robert Oliver |
| Ormerod | >Grace Ormerod (d 1746) | *Jane Ormerod (d 1671) |
| Orrock | >J C Orrock | >Violet Mary Orrock (b 1883) |
| Osbaldston | >Alexander Osbaldston | |
| Osborne | >Richard Osborne (b 1945) | |
| Owain | 'Einion ap Owain | |
| Owen | Catherine Owen (b 1789 d 1864) | Edward Owen |
| 'Elizabeth Owen | -Elizabeth Owen (b 1759) | |
| *Ellin Owen (b 1748) | -Ellin Owen (b 1747 d 1747) | |
| >Henry Owen | 'Henry Owen | |
| -Jane Owen (b 1753) | 'John Owen | |
| -John Owen (b 1750) | Richard Owen (b 1787) | |
| -Thomas Owen (b 1756) | *William Owen (b 1718 d 1762) | |
| Oxeleye | >Elizabeth Oxeleye |