↑ "United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLS4-QGQ : accessed 29 March 2016), Nannie L Brotherton in household of Sidney A Brotherton, Catawba Springs, Lincoln, North Carolina, United States; citing enumeration district (ED) ED 65, sheet 15A, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,375,130.
Find A Grave Memorial# 39556293, Lucy "Nannie Lou" Cashion Brotherton, Webb's Chapel United Methodist Church Cemetery, Denver, Lincoln County, North Carolina, USA. 
"North Carolina Deaths, 1931-1994," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FP3J-XYR : accessed 15 May 2016), James H. Cashion in entry for Nannie Lou Brotherton, 14 Apr 1970; citing Mooresville, Iredell, North Carolina, v 13B cn 13701, State Department of Archives and History, Raleigh; FHL microfilm 1,983,402.
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It may be possible to confirm family relationships with Nannie 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 DNA with Nannie: