"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M92L-X8C : accessed 14 January 2019), Glen Randolph in household of Chas Randolph, Wapillo Township Wapillo city, Louisa, Iowa, United States; citing enumeration district (ED) 90, sheet 23B, family 516, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,445.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M81Y-65B : accessed 14 January 2019), Glen Randolph, Muscatine Ward 4, Muscatine, Iowa, United States; citing ED 126, sheet 2A, line 4, family 25, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 504; FHL microfilm 1,820,504.
"Illinois Deaths and Stillbirths, 1916-1947," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:NQS5-CKC : 9 March 2018), Glenn Henry Randolph, 15 Aug 1941; Public Board of Health, Archives, Springfield; FHL microfilm 1,851,212.
It may be possible to confirm family relationships with Glenn by comparing test results with other carriers of his Y-chromosome or his mother's 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 Glenn: