François was the son of Jean I de Duisy but his mother is unknown. The date and place of his birth have not been found.
His wife is not known. They were married, but the date and place have not been found. Their only known child was Marie (c1340-?).
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Jean I de Duisy |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | seigneur de Préfontaines |