Jean was the son of Dreux I de Mont-Saint-Jean and Marguerite de Joinville. The date and place of his birth have not been found.
He died before 1323. The place is not known.
His wife was Jeanne de Villurbain. They were married, but the date and place have not been found. Their only known child was Dreux II (?-c1326).
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Jean I de Mont-Saint-Jean |
Dreux I de Mont-Saint-Jean |
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Marguerite de Joinville |
Jean de Joinville |
Simon I de Joinville |
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Béatrix de Bourgogne-Comte |
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Alix de Reynel |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | BEF 1323 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | seigneur de Charny |