| b 1034, Of, , Normandy, France | Herbastus De Crepon | |||
| Herfast | b 0911 | |||
| | b 0975 | Mrs-Herbastus De Crepon | |||
| Osbern, [Steward] | b 0916 | |||
| |b 1000 | | | |||
| | | ||||
| | | ||||
| Emma Fitzosbern | ||||
| |William De Vernon | |m 1055 | Ralph Count Of Ivry | ||
| |Of, , Normandy, France | |b 0978 | |||
| Emma Of Ivry | ||||
| b 1008 | | | |||
| 1 | Hugh De Reviers | 2 | < | Richard De Reviers, [Seigneur] |