Mahaut was born in 1189 in France, the daughter of Gascé V de Poissy and Constance de Courtenay-Châteaufort.
She died after 25 JUL 1267. The place is not known.
Her husband was Bouchard I de Montmorency, who she married in BEF JUN 1209. The place has not been found. Their five known children were Mabille (c1215-1256), Bouchard II (c1215-1250), Pierre (?-1240), Mathieu (?-1234) and saint Thibaud (?-1247).
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Mahaut de Poissy |
Gascé V de Poissy |
Gascé IV (III) de Poissy |
Gascé III (II) de Chaumont |
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Jacqueline de Poissy |
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Jacqueline de Fresne |
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Constance de Courtenay-Châteaufort |
Pierre I Capet |
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Élisabeth de Courtenay |
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| Event | Date | Details | Source | Multimedia | Notes | ||
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| Birth | 1189 |
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| Death | AFT 25 JUL 1267 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | dame de Châteaufort |