Guillaume was the son of Raoul IX de Montfort and Jeanne de Kergorlay. The date and place of his birth have not been found.
He died in 1426. The place is not known.
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Guillaume de Montfort |
Raoul IX de Montfort |
Raoul VIII de Montfort |
Raoul VII de Montfort |
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|
Aliénor d'Ancenis |
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|
Isabeau de la Roche-Bernard |
Eudes III de la Roche-Bernard |
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Béatrice de Craon |
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Jeanne de Kergorlay |
Jean III de Kergorlay |
Jean II de Kergorlay |
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Hervé VII de Léon |
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|
Marguerite d'Avaugour |
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| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | 1426 |
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