Clarence, the son of Jess Ducummon and Sarah Waldrop, was born 1919 in Tulsa Oklahoma. By 1940, He was married to Crystal and had a son, named Clarence. They lived with his parents at 1434 East First Street in Tulsa, Oklahoma. 
↑ "United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJM5-MJZ : 14 December 2015), Clarence Ducummon in household of Jess Ducummon, Tulsa, Tulsa, Oklahoma, United States; citing sheet 4B, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,821,487.
↑ "United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VB2D-P99 : accessed 4 October 2016), Clarence Ducummon in household of Jess Ducummon, Area D, Tulsa, Tulsa City, Tulsa, Oklahoma, United States; citing enumeration district (ED) 79-44, sheet 3A, family 59, 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 3349.