My ancestor Nicholas Tart lived in Essex, New York in 1850. He and his wife Margarett were born in Canada. I'm trying to determine whether he is French-Canadian and whether his birth name was actually Nicolas Letartre. I found a marriage of Nicolas Letartre and Marguerite Gareau in 1817 in St-Luc, St-Jean, Quebec, but have not yet searched the parish registers to match the children. Does anyone know about the origins of this family?