"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGVS-HQF : accessed 1 October 2020), John Rolfe in household of Theodore F Rolfe, Fruit Valley, Clark, Washington, United States.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M4ZP-25C : accessed 1 October 2020), John M Rolfe in household of Theodore M Rolfe, Rutledge, Sherman, Oregon, United States.
Find A Grave: Memorial #52436013 for John Marshall Rolfe (19 Jul 1907–20 Apr 1959), citing Grass Valley Cemetery, Grass Valley, Sherman County, Oregon, USA.
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DNA Connections
It may be possible to confirm family relationships with John 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 John: