My heritage traces to Narcisse Frenier, a Bois-brule fur trader from Canada. I've heard he was one of several brothers. He Married Susan Crawford, the granddaughter of Tatanka-mani(Sisseton chief)in 1818 in Minnesota. He was born in 1790 and disappeared during a fur trading expedition. I think it is possible that he may be related to(brother of)the Lafrenieres that you talk about. Their daughter, Susan Frenier, born 1819, married Joseph Renshaw Brown.