We may have something here. I have a Pierre Ducharme (my # 7931), born Feb 08, 1845 in Montréal, and baptized the same day in Notre-Dame Church. He was the son of Pierre Charron dit Ducharme and Eleonore Payan dit Sy-Onge.
I know nothing else about him, except that he was in the 1860 USA census, but I don't have a source for that info. He could be the same Pierre Ducharme (my # 35359) that married Célina Dacier somewhere around 1880. Did Ann sévigny told you when he was naturalized ?
For Pierre and Célina dacier, I have the following children: -François-Xavier, 1863 -Marie-Rose-Célina, 1884 (died young likely) -Arcure (Hercule ?) 1886 -Joseph-Edmore (Armour ?), 1887 -Joseph-George, 1889 -Marie-Alice, 1890 -Arthur-adélard, 1892 -Marie-Rose, 1894 -Léon-Henri (Léo ?), 1895 -Guillaume-Joseph, 1898. all were baptized in St-Joseph, Ashton, RI
P.S.: Don't pay attention to # above. Only to help me come back to my files, if needed.