Eustachine was born about 1535 in Saint-Coulomb, Cancale, Saint-Malo, Ille et Vilaine, Bretagne, France , the daughter of unknown parents.
She died in 1591. The place is not known.
Her husband was Guillaume Mallet, who she married in 1554. The place has not been found. Their only known child was Olivier (?-?).
| Event | Date | Details | Source | Multimedia | Notes | ||
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| Birth | ABT 1535 |
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| Death | 1591 |
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| Burial | 11 DEC 1591 |
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