Guillaume was born in 1044, the son of Gilbert I de Brionne and Gunnora de Courcy. The place is not known.
He died in 1074 in Bec, Eure, Normandie, France.
His wife was Ève de Montfort. They were married, but the date and place have not been found. Their only known child was Guillaume II (c1070-c1118).
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Guillaume I de Crespin |
Gilbert I de Brionne |
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Gunnora de Courcy |
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| Event | Date | Details | Source | Multimedia | Notes | ||
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| Birth | 1044 |
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| Death | 1074 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | baron du Bec-Crespin |
Note 1