| Male Herfast de Crépon |
| Birth | About 911 | Normandy, France |
| Death | ||
| Burial | ||
| Marriage | ||
| Father | Senfrie | F3667 Group Sheet | |
| Mother | ||
| Female + Avelina de Crepon |
| Birth | Abt 974 | Longueville, Normandy, France |
| Death | ||
| Burial | ||
| Spouse | Osbern de Bolbec | F2978 | |
| Marriage | Abt 1001 | France |
| Male + Osbern, Steward of Normandy |
| Birth | ||
| Death | 1040 | Normandy, France |
| Burial | ||
| Spouse | Emma of Ivry | F3005 | |
| Marriage | ||
| Female + Gunnor of Crêpon |
| Birth | About 936 | |
| Death | 1027 or 1031 | France |
| Burial | ||
| Spouse | Richard I, Duke of Normandy | F1912 | |
| Marriage | About 978 | |
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