She’s not a descendant of Jefferson Davis. A number of folks on Twitter ranthis down. The link above is a good summary page (with links to the genealogy for Rep. Horne available from public records and for Jefferson Davis, available from Rice University).
Her local paper has been notifed, and they do nothing. Same for WaPo, NYT, etc. nobody wants to upset the narrative.
The author of the article I posted, has ignored my emails, in which I proved that Horne is a liar.
Concise Ancestry of S.C. Rep. Jenny Anderson Horne (version 1.09)
Note: This regards the claim of descent from the President of the Confederacy during the American Civil War, Jefferson Davis. His great grandchildren at birth used the following surnames only: Webb, Young, Hayes, Davis. They lived in the 20th century. See sources below.
First Generation
Jenny Anderson born Oct 12, 1972. Married Marc F. Horne May 11, 1996.
Second Generation
John Daniel Anderson, Jr., and Cynthia Williams
Third Generation
John Daniel Anderson Sr., (Nov. 22, 1923-Jul. 27, 1970) and Queenie Bell Ahl (b. cir. 1926-present)
James Pryor Williams (Aug. 29, 1923-Oct. 10, 1987) and Imogene Swicegood
Fourth Generation
Merdick Luther Anderson (1898-1940) and Bertha R. (1894-1940) (Family from Michigan)
Dewey Wade Ahl (1897-1981) and Alice Mae Infinger (1891-1945)
Fred James Williams (b. Oct 1897) and Lida Mae Pryor (b. cir. 1901, Alabama) (Living in Maryville, TN at son’s birth)
John Willis Swicegood (1885 - 1948) and Annie Caroline Bell (1891 - 1962)
Fifth Generation (incomplete)
John Capers All (1860-1949) and Eva Ann Brant (1860-1945)
Nathaniel Infinger* (1838-1907) and Anna Malissa Infinger (1868-1916)
James Madison Williams Jr. (1867-1941) and Sophronia Tennessee Gibson (1865-1942)
Henry Franklin Swicegood** (1834 - 1908) and Susan Lucy Sink (1836 - 1908)
* Co. B, 11th Reg., SC Infantry, CSA
** Co. D, 48th Reg., NC Infantry, CSA
Additional thoughts and research directions for more distant collateral lines:
The mother of Henry Franklin Swicegood was Sophia Davis (1811-1881) who had a brother named Evan Davis. Suggests this particular Davis line was Welsh as well in the past (Evan is Welsh for John). Ostensibly, no link to the ancestral immigrant ancestor of Jefferson Davis.
The family of Lida Mae Pryor may prove fruitful for a potential collateral connection. Well educated, it is possible she had knowledge of some connection to the greater Jefferson Davis family.
The paternal grandmother of Jefferson Davis, Mary Emory, was a widow of a Mr. Williams. She is recorded as having two sons from that marriage.
Anderson genealogy sources:
http://www.scstatehouse.gov/member.php?code=0871590805
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=26670275
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=24187757
http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=hatcher-rizer&id=I2344&style=TABLE
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=60626392
1930, 1940 US Census, Blount co., TN
http://www.genealogy.com/forum/surnames/topics/mccauley/2047/
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=39382506
http://boards.ancestry.com/thread.aspx?mv=flat&m=5882&p=localities.northam.usa.states.michigan.unknown
http://records.ancestry.com/anna_malissa_infinger_records.ashx?pid=103810593
Note Sources:
https://jeffersondavis.rice.edu/Genealogy.aspx
http://dgmweb.net/JeffDavisHome.html
http://www.washingtonpost.com/news/morning-mix/wp/2015/07/09/south-carolina-rep-jenny-horne-on-her-historic-and-surprisingly-personal-speech-it-needed-to-be-done/
Corrections and additions appreciated. Contact @zippy_ghost on Twitter.