The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
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 | Norman de Bassett, de Centeville (915-975)
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 | Isabel Corbet (924-976) |
| Herfast de Crepon (930- )  |
| Gunnora de Crepon, d'Arques of Pays de Caux (948-1031) |
| Josselun Arques (985-1035) |
| Walter de Giffard, Lord of Longueville (1010-1087) |
| Osbern Giffard (1020-1085) |
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