| b 1000, Of, , Normandy, France | ||||
| Herbastus De Crepon | ||||
| | b 0911 | ||||
| Herfast | ||||
| |b 0975 | | | |||
| | | Mrs-Herbastus De Crepon | |||
| | | b 0916 | |||
| Osbern, [Steward] | ||||
| |Emma Of Ivry | |m 1029 | |||
| |Of, , , France | | | |||
| | | ||||
| 1 | William Fitzosbern, Earl of Hereford | 2 | Osbern Fitzosbern, [Bishop] | 3 | < | Emma Fitzosbern |