The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
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 MaleRobert de Conteville, Count of Mortain |
| Birth | 1036-1038 | |
| Death | 8 Dec aft. 1087-1091 | |
| Burial | Abbey of Grestain  |
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| Marriage | After 27 Apr 1085 | |
| Other Spouse | Mathilde de Montgomery, daughter of Roger Seigneur de Montgommery | F399098 | |
| Marriage | bef. 1066 | |
| Father | Herlewin de Conteville | F399075 Group Sheet | |
| Mother | Herleva of Falaise | F399075 Group Sheet | |
| Male + Richard de Mont St. Michel |
| Birth | 1080-1087 | |
| Death | ||
| Burial | ||
| Spouse | Alice St. John-di Molise, m. Richard de Mont (possibly son of Robert de Mortain) | F4864 | |
| Marriage | 1100-1125 | |
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Female