Eustaisse was the daughter of Geoffroy VII de Châteaubriant and Isabeau de Machecoul. The date and place of her birth have not been found.
Her husband was Olivier III de Tinténiac. They were married, but the date and place have not been found. Their four known children were Jean (?-1452), Briand (?-?), Olivier IV (?-c1371) and Alain (?-1352).
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Geoffroy VII de Châteaubriant |
Geoffroy VI de Châteaubriant |
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Isabeau de Machecoul |
Olivier I de Machecoul |
Pierre I de Dreux |
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Marguerite de Montaigu |
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Eustachie de Vitré |
André III de Vitré |
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Thomasse de la Guerche |