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Marie-Therese Desmaris was born 17 AUG 1719. She is the daughter of Paul DesMarais (1687-?) and Marie-Marguerite Fontaine dit Bienvenue.
Marie-Therese Desmaris's husband was Louis Langevin (1715-1747). They were married 19 NOV 1736 in Vercheres, Quebec, Canada. They had one known child named Francois Langevin.