"United States Census, 1840," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:XHB3-CTR : 2 March 2021), Cornelius Dunham, Arcadia, Wayne, New York, United States; citing p. 152, NARA microfilm publication , (Washington D.C.: National Archives and Records Administration, n.d.), roll ; FHL microfilm .
"United States Census, 1850," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MCR1-V6K : 23 December 2020), Cornelius Dunham, Arcadia, Wayne, New York, United States; citing family , NARA microfilm publication (Washington, D.C.: National Archives and Records Administration, n.d.).
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DNA Connections
It may be possible to confirm family relationships with Cornelius 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: