"New Hampshire Marriages, 1720-1920," database, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FDVS-NXN : 10 February 2018), David Dufrane in entry for Fred Dufrane and Nelly Cota, 17 Feb 1884; citing reference ; FHL microfilm 1,003,055.
"New Hampshire Death Records, 1654-1947," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FSJX-YXB : 10 March 2018), David Dufresne, 04 Sep 1919; citing Laconia, , New Hampshire, Bureau Vital Records and Health Statistics, Concord; FHL microfilm 2,079,017.
"New Hampshire Marriage Records, 1637-1947," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FLX1-89S : 4 November 2017), David Dufrane in entry for Fred Dufrane and Nelly Cota, 17 Feb 1884; citing Franklin, , New Hampshire, Bureau of Vital Records and Health Statistics, Concord; FHL microfilm 1,000,983.
"Massachusetts Deaths, 1841-1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:N46M-8X3 : 22 May 2019), David Dufresne in entry for Mary Beatrice Dufresne, 31 Mar 1906; citing Brookline,,Massachusetts, 95, State Archives, Boston; FHL microfilm 2,224,943.
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DNA Connections
It may be possible to confirm family relationships with David by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA test-takers in his direct paternal line.
Mitochondrial DNA test-takers in the direct maternal line: