↑ "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.
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: