↑ Find a Grave, database and images (accessed 17 May 2022), memorial page for Isaac O Calkins (1810–1893), Find A Grave: Memorial #55518583, citing Rockland Cemetery, Rockland, La Crosse County, Wisconsin, USA ; Maintained by Anonymous (contributor 47268792) .
"Massachusetts Births and Christenings, 1639-1915," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:V5N4-RHH : 4 December 2014), Emeline Eliza Calkins, 24 Sep 1843; citing , LONGMEADOW, HAMPDEN, MASSACHUSETTS, ; FHL microfilm 185,399.
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DNA Connections
It may be possible to confirm family relationships with Isaac by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: