
| Name | Sir William (Guillaume) FitzOsbern | |
| Suffix | Earl de Breteuit, Breteuil, Pacy | |
| Birth | Aft 1052 | Breteuit, France, Normandy |
| Gender | Male | |
| Title of Nobility | Guillaume, Seigneur de Breteuil | |
| _FSFTID | 949V-MJZ | |
| _UID | A974011A690EC141B06DB284E6DB89004E8B | |
| Death | 1103 | |
| Person ID | I6181 | Ken Tree |
| Last Modified | 3 Nov 2019 | |
| Family | Adeliza de Montfort, b. 1075, Montfort, Dordogne, Aquitaine, France d. 1128, Somme, Picardie, France (Age 53 years) | |
| _UID | 0A97EEF8631EBC4B8A9747C354AF88753ACA | |
| Family ID | F6993 | Group Sheet | Family Chart |
| Last Modified | 1 Apr 2026 | |