The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
 MaleJohn de Conteville, Vicomte de Conteville; Baron of Tonsburgh |
| Birth | 965 | |
| Death | ||
| Burial | ||
| Marriage | ||
| Father | Baudouin II de Blois, dit de Neustrie | F399079 Group Sheet | |
| Mother | ||
| Male + Herlewin de Conteville |
| Birth | 1001 | |
| Death | 1066 | |
| Burial | 1066 | Abbey of Grestain  |
| Spouse | Fredesendis le Brun, of Grestain Abbey | F399076 | |
| Marriage | ||
| Spouse | Herleva of Falaise | F399075 | |
| Marriage | ||
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