Marguerite was the daughter of Guillaume de Beaumont-Gâtinais and Jeanne d'Aquigny. The date and place of her birth have not been found.
She died after 1295. The place is not known.
Her husband was Alain II d'Avaugour, who she married in ABT 1263. The place has not been found. Their two known children were Alix (c1267->1303) and Havoise (c1265-?).
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Marguerite de Beaumont-Gâtinais |
Guillaume de Beaumont-Gâtinais |
Jean de Beaumont-Gâtinais |
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Alix de Villemomble |
Robert de Mauvoisin |
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Cécile de Chevreuse |
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Jeanne d'Aquigny |
Baudouin de Tosny |
Raoul IV de Tosny |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | AFT 1295 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | dame de Bretigny |