Jean was the son of Barthélémy III de l'Isle-Bouchard and Eustachie de Doué. The date and place of his birth have not been found.
He died after 1346. The place is not known.
His wife was Isabeau de Montbazon, who he married in 1327. The place has not been found. Their only known child was Jeanne (c1320-?).
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Jean I de l'Isle-Bouchard |
Barthélémy III de l'Isle-Bouchard |
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Eustachie de Doué |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | AFT 1346 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | seigneur de Saint-Mars |