Surname is not Mongont...it's Mongeon, or Mongont aka Mongeon.
Citing this Record "Québec naissances et baptêmes, 1662-1898," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XLR9-T7L : 11 February 2018), Louis Mongont in entry for Francois Mongont, 10 Oct 1816; citing Vercheres, Vercheres, Quebec; FHL microfilm 1,288,563.
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