| Name | William FitzOsbern | |
| Title | Created Earl of Hereford before 22 February 1067, one of the first peerage titles in the English peerage. | |
| Suffix | Lord of Breteuil, in Normandy, 1st Earl of Hereford, Earl of Wessex | |
| Birth | Abt. 1020 | |
| Gender | Male | |
| War | 1066 | |
| He is one of the very few proven companions of William the Conqueror known to have fought at the Battle of Hastings in 1066 | ||
| Death | 22 Feb 1071 | |
| Person ID | I322036152362 | Hurst Improbable Family Tree |
| Last Modified | 11 Feb 2022 | |
| Father | Osbern, de Crépon d. Abt. 1040 | |
| Mother | Emma | |
| Family ID | F328 | Group Sheet | Family Chart |