Agnès was the daughter of Guy de Montfort-Castres and Briende de Beynes. The date and place of her birth have not been found.
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Guy de Montfort-Castres |
Simon IV de Montfort |
Simon III de Montfort |
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Mathilde de Beaumont |
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Amicie de Beaumont-le-Roger |
Robert III de Beaumont-le-Roger |
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Pernelle de Grandmesnil |
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Note 1
nonne à l'abbaye Saint-Antoine des Champs à Paris