"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MPV6-38F : accessed 10 March 2020), William S Tregernbo in household of Minnie Tregernbo, Knight, Iron, Wisconsin, United States; citing enumeration district (ED) ED 30, sheet 9A, family 142, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1713; FHL microfilm 1,375,726.
"California Death Index, 1940-1997," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VP97-PNG : 26 November 2014), William Stephen Tregembo, 06 Jun 1989; Department of Public Health Services, Sacramento.
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