Fort McPherson National Cemetery
Plot: G, 0, 86
"United States World War I Draft Registration Cards, 1917-1918," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K66Z-WDG : 12 December 2014), Clarence Lowell Cain, 1917-1918; citing Doniphan County, Kansas, United States, NARA microfilm publication M1509 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,643,512.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VM3W-WWL : 19 May 2014), Clarence Cain, Jan 1965; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing)
It may be possible to confirm family relationships with Clarence by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Clarence: