Agnès was born about 1045, the daughter of Hugues I de Grandmesnil and Alix de Beaumont-sur-Oise. The place is not known.
Her husband was Guillaume de Say. They were married, but the date and place have not been found. Their only known child was Jourdain (1068-?).
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Agnès de Grandmesnil |
Hugues I de Grandmesnil |
Robert I |
Gervaise de Grandmesnil |
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Hawise d'Échauffour |
Giroie d'Échauffour |
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Gisèle de Montfort |
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Alix de Beaumont-sur-Oise |
Yves de Beaumont-sur-Oise |
Yves II de Beaumont-sur-Oise |
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Judée Lupus de Bretagne |
Geoffroy I Bérenger de Bretagne |
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Havoise de Normandie |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Birth | ABT 1045 |
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