Isabeau was the daughter of Eudes III de la Roche-Bernard and Béatrice de Craon. The date and place of her birth have not been found.
She died on 10 OCT 1400. The place is not known.
Her husband was Raoul VIII de Montfort. They were married, but the date and place have not been found. Their three known children were Raoul IX (1364-1419), Jeanne (?-?) and Guillaume (?-1432).
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Isabeau de la Roche-Bernard |
Eudes III de la Roche-Bernard |
Péan de la Roche-Bernard |
Eon II de la Roche |
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Hermine de Lohéac |
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Isabeau de Laval |
Guy IX de Montmorency-Laval |
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Béatrice de Craon |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | 10 OCT 1400 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | dame Héritière de Lohéac et de La Roche-en-Nort | |||||
| Nobility Title | baronne héritière de la Roche-Bernard | |||||
| Nobility Title | châtelaine de la Brétesche |