Burial:
Memorial Park Cemetery, Lawrence, Douglas County, Kansas, USA
Plot: Good Shepherd & Acacia Section B & C
Sources
"Clarks, Harts and La Dukes of Connecticut, Rhode Island, New York, & Ohio, and associated families," Schroeder, Lois Jeannette Barber, 1990, page 333.
"United States Census, 1910," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:M2C6-5S6 : accessed 5 January 2021), Bertha Siduke in household of Ray Siduke, Rural Township, Jefferson, Kansas, United States; citing enumeration district (ED) ED 78, sheet 4A, family 60, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 442; FHL microfilm 1,374,455.
"Kansas State Census, 1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QGTL-JKHK : 13 October 2019), Bertha la Duke in household of R A la Duke, Wakarusa Township, Douglas, Kansas, United States; citing Wakarusa Township, Douglas, Kansas, United States, 40, 30, Kansas Historical Society, Topeka.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MF6H-33W : accessed 15 July 2020), Bertha La Duke in household of R A Ladake, Wakarusa, Douglas, Kansas, United States; citing ED 80, sheet 7B, line 54, family 143, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 531; FHL microfilm 1,820,531.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VRKM-G4G : 26 July 2019), Bertha Cooper in household of Carrie Cooper, Ward 4, Lawrence, Lawrence City, Douglas, Kansas, United States; citing enumeration district (ED) 23-12A, sheet 5A, line 24, family 115, 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 1229.
Find a Grave, database and images (https://www.findagrave.com : accessed 15 July 2020), memorial page for Bertha V LaDuke Cooper (1909–1980), Find a Grave Memorial no. 9595847, citing Memorial Park Cemetery, Lawrence, Douglas County, Kansas, USA ; Maintained by Jennifer (contributor 46554568) .
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DNA Connections
It may be possible to confirm family relationships with Bertha by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Bertha: