↑ ["United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K4ZR-96L : accessed 27 March 2017), Coy Barnes in household of Caldonia Barnes, Pigeon Forge, Civil District 13, Sevier, Tennessee, United States; citing enumeration district (ED) 78-21, sheet 15B, line 71, family 232, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 3933.]
It may be possible to confirm family relationships with Coy by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: