↑ 1920 United States Federal Census. HORAN Jefferson D. Database online. Justice Precinct 1, McLennan, Texas, ED , roll , page , image 602.
↑ 1880 United States Federal Census. Database online. Year: 1880; Census Place: Austin, Travis, Texas; Roll: T9_1329; Family History Film: 1255329; Page: 191.2000; Enumeration District: 130; Image: .
↑ 1930 United States Federal Census. Database online. Year: 1930; Census Place: Waco, McLennan, Texas; Roll: 2373; Page: 12A; Enumeration District: 8; Image: 382.0.
↑ Texas Death Index, 1903-2000. HORAN Jefferson Davis. Database online. FOOT Ancestry.com, Texas Death Index, 1903-2000 (Provo, UT, USA, The Generations Network, Inc., 2006), www.findmypast.com, HORAN Jefferson Davis. Database online.
↑ One World Tree. HORAN Jefferson Davis. Database online.
↑Gedmatch X match one to one comparison confirmation of relationships between T766864, T410351 and A969300; resulting in Triangulated segment = 14 cM, Chromosome 23, 99.7-115.4, 30 Dec 2016.
It may be possible to confirm family relationships with Jefferson by comparing test results with other
carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Jefferson: