Isabeau was the daughter of Jean I d'Harcourt and Alix de Beaumont-Gâtinais. The date and place of her birth have not been found.
She died in 1340. The place is not known.
Her husband was Jean de Saint-Martin. They were married, but the date and place have not been found. They had no known children.
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Isabeau d'Harcourt |
Jean I d'Harcourt |
Richard d'Harcourt |
Robert II d'Harcourt |
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Jeanne |
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Mathilde Tesson |
Raoul Tesson |
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Mathilde de Patry |
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Alix de Beaumont-Gâtinais |
Jean de Beaumont-Gâtinais |
Adam de Beaumont-Gâtinais |
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Alix le Riche |
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Alix de Villemomble |
Robert de Mauvoisin |
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Cécile de Chevreuse |
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | 1340 |
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