Guillaume was the son of Adam III de Melun and Comtesse de Sancerre. The date and place of his birth have not been found.
His wife was Alix de Chacenay, who he married in 1260. The place has not been found. They had no known children.
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Adam III de Melun |
Guillaume II de Melun |
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Agnès de Montreuil-Bellay |
Giraut III de Montreuil-Bellay |
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Comtesse de Sancerre |
Étienne II de Blois |
Étienne I de Blois |
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Alix de Donzy |
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Éléonore de Nesle-Soissons |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | vicomte de Melun | |||||
| Nobility Title | seigneur de Montreuil-Bellay |