Isabeau was the daughter of Jean I de Barbançon and Jeanne du Châtelet. The date and place of her birth have not been found.
She died about 1415. The place is not known.
Her husband was Simon III de Lalaing. They were married, but the date and place have not been found. Their two known children were Marie (1413-1474) and Jeanne (?-c1462).
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Isabeau de Barbançon |
Jean I de Barbançon |
Gérard II de Barbançon |
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Marie de Pottes |
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Jeanne du Châtelet |
Jean II du Châtelet |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | ABT 1415 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | dame de Montigny-St. Christophe |