"United States Census, 1940", database with images, FamilySearch (ark:/61903/1:1:VR2H-4GW : Mon Apr 03 17:53:14 UTC 2023), Entry for Floyd O Olson and Ida Mary Olson, 1940.
"California Death Index, 1940-1997," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VPN2-GFQ : 26 November 2014), Thomas Charles Olson, 07 Sep 1993; Department of Public Health Services, Sacramento.
Find a Grave, database and images (https://www.findagrave.com/memorial/152358784/thomas-charles-olson: accessed 01 May 2023), memorial page for Thomas Charles Olson (4 Jul 1936–7 Sep 1993), Find A Grave: Memorial #152358784, citing Lakewood Memorial Park, Hughson, Stanislaus County, California, USA; Maintained by Lincoln Lowery (contributor 47305178).
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DNA Connections
It may be possible to confirm family relationships with Thomas 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 some percentage of DNA with Thomas: