d/o Frederick William BARKOFF & Sarah Edith RUSSELL
Sources
"Iowa State Census, 1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QK4T-YWLD : 17 March 2018), Edna Barkoff, 1915; citing Mount Ayr, Ringgold, Iowa, United States, card no. , Iowa State Historical Department, Des Moines; FHL microfilm 1,462,745.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MXLF-ZFD : accessed 5 July 2019), Edna G Barkoff in household of Fred W Barkoff, Winbourn, Weld, Colorado, United States; citing ED 249, sheet 6A, line 25, family 127, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 172; FHL microfilm 1,820,172.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X7W8-SFW : accessed 5 July 2019), Edna Barkoff in household of Fred Barkoff, Hudson, Weld, Colorado, United States; citing enumeration district (ED) ED 43, sheet 6B, line 81, family 94, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 252; FHL microfilm 2,339,987.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VRDD-GMN : accessed 14 May 2017), Edna G Willhite in household of Willis Willhite, Election Precinct 27, Weld, Colorado, United States; citing enumeration district (ED) 62-43, sheet 2A, line 19, family 29, 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 482.
"Nebraska Marriages, 1855-1995," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q213-SJHT : 28 November 2018), Willis Willhite and Edna Barkoff, 01 Nov 1932; citing Deuel, Nebraska, United States, various county courthouses, Idaho; FHL microfilm.
"United States, Obituaries, American Historical Society of Germans from Russia, 1899-2012," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVSQ-Z8K4 : 31 July 2014), Edna Grace Willhite, 13 Dec 1977; citing Obituary, in "Greeley Tribune"; American Historical Society of Germans from Russia, Lincoln.