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Marie-Barbe Tetreau dit Ducharme is the daughter of Joachim Tetreau dit Ducharme (1723-?) and Barbe Trudeau (1721-?).
Marie-Barbe Tetreau dit Ducharme's husband is Francois Langevin. They were married 10 NOV 1766 in Vercheres, Quebec, Canada. They had one known child named Marie-Amable Langevin.