"United States Census, 1930," database with images, FamilySearch ( : accessed 10 October 2019), Margaret Hinkel in household of Hillard Hinkel, Baldwin, Allegheny, Pennsylvania, United States; citing enumeration district (ED) ED 499, sheet 10A, line 18, family 194, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1960; FHL microfilm 2,341,694., 
"United States Census, 1940," database with images, FamilySearch ( : 19 August 2019), Margaret Hinkel in household of Hillard Hinkel, Gas, Mill Township, Grant, Indiana, United States; citing enumeration district (ED) 27-35, sheet 9A, line 14, family 179, 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 1048. 
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It may be possible to confirm family relationships with Margaret by comparing test results with other carriers of her ancestors' 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 DNA with Margaret: