Jean was the son of Gilles II de Mailly and Jeanne d'Amiens. The date and place of his birth have not been found.
His wife was Jeanne de Coucy. They were married, but the date and place have not been found. They had no known children.
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Gilles II de Mailly |
Gilles I de Mailly |
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Ermogie Amélie de Beaumont |
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Amicie de Heilly |
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Jeanne d'Amiens |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | seigneur de Mailly, d'Acheu et de Ploich |