Sébastienne was born in origine inconnue, the daughter of unknown parents. The date is not known.
Her husband was David Létourneau, who she married in 1640 in Muron, Tonnay-Charentes, Rochefort, Charente-Maritime, Poitou-Charentes, France . Their two known children were David (1642-1709) and Jean (1647-1722).
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