Guillaume was the son of Guillaume III de Sainte-Maure and Jeanne de Rançon. The date and place of his birth have not been found.
He died about 1300. The place is not known.
His wife was Blanche de Nemours. They were married, but the date and place have not been found. They had no known children.
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Guillaume IV de Sainte-Maure |
Guillaume III de Sainte-Maure |
Josbert de Sainte-Maure |
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Agnès de Vendôme |
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Jeanne de Rançon |
Geoffroy V de Rançon |
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Jeanne Maingot de Surgères |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | ABT 1300 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | sire de Montbason |