Marie Louise, daughter of Charles Réaume and Louise Roman, was born 25 Jun 1825 and baptized the following day in the parish of Saint-Constant, Bas-Constant.
Pierre Pitre, minor son of Pierre Pitre and Marguerite Prugot, and Marie Louise Réaume, minor daughter of Charles Réaume and Louise Roman, were married 25 Sep 1848 in the parish of Sainte Philomène, Mercier, Canada-Est. 
"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M8FX-R7W : accessed 7 October 2015), Mary Peats in household of Peter Peats, New York, United States; citing p. 94, family 696, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,418.
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It may be possible to confirm family relationships with Marie Louise by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Marie Louise: