| Name | Birth date | Relationship with Thomas Jefferson |
|---|
| Abernathy, Elizabeth | 1766 | Wife of the 1st cousin once removed |
| Abernathy, Elizabeth | 1814 | Wife of the 1st cousin twice removed |
| Abernathy, Susannah | Abt. 1790 | Wife of the 1st cousin twice removed |
| Acedo, Mr. | | Husband of the 1st cousin 5 times removed |
| Adair, J. B. | | Husband of the 1st cousin 6 times removed |
| Adair, James Gordon | | 1st cousin 7 times removed |
| Adair, James Kenneth | | 1st cousin 7 times removed |
| Adams, Earl V. | | Husband of the 1st cousin 6 times removed |
| | | Husband of the 1st cousin 7 times removed |
| Adams, Mary White | | Wife of the 1st cousin 4 times removed |
| Addie, Francis | Abt. 1563 | 4th great-grandfather |
| Addie, Mary | 1602 | 3rd great-grandmother |
| Adell | | Wife of the 1st cousin 6 times removed |
| Akin, Albert C. | | Husband of the 1st cousin 6 times removed |
| Akin, Dennis | | 1st cousin 7 times removed |
| Akin, Neil | | 1st cousin 7 times removed |
| Akin, Suzanne | | 1st cousin 7 times removed |
| Alberts, Austin Hunter | | 1st cousin 10 times removed |
| Alberts, Dustin Lee | | 1st cousin 10 times removed |
| Alberts, Michael Shane | | Husband of the 1st cousin 9 times removed |
| Alderson, Anna | Abt. 1840 | 1st cousin 3 times removed |
| | | 1st cousin 4 times removed |
| Alderson, Benjamin | | Husband of the 1st cousin twice removed |
| | | Husband of the 1st cousin 3 times removed |
| Alderson, Judge Benjamin | | Husband of the 1st cousin twice removed |
| | | Husband of the 1st cousin 3 times removed |
| Alexander, Arvel Leonard | February 14, 1891 | Husband of the 1st cousin 6 times removed |
| Alexander, Larry | | 1st cousin 8 times removed |
| Alexander, Leonard Ray | April 22, 1911 | 1st cousin 7 times removed |
| Alford, Sibyl L. | | Wife of the 1st cousin 6 times removed |
| Alice | | 4th great-grandmother |
| Allen, Elizabeth | December 07, 1739 | Wife of the 1st cousin |
| Allen, Grant | 1790 | 1st cousin twice removed |
| Allen, Hannah | 1796 | 1st cousin twice removed |
| Allen, Howard | 1782 | 1st cousin twice removed |
| Allen, John | 1794 | 1st cousin 3 times removed |
| Allen, Joseph | 1794 | 1st cousin twice removed |
| Allen, Nancy Ann | 1787 | 1st cousin twice removed |
| Allen, Rebecca | 1784 | 1st cousin twice removed |
| Allen, Thomas H. | 1780 | 1st cousin twice removed |
| Allen, Vincent | | Husband of the 1st cousin twice removed |
| Allen, William | 1752 | Husband of the 1st cousin once removed |
| Allen, William H. | 1792 | 1st cousin twice removed |
| Alley, Heath Jeremy | | 1st cousin 7 times removed |
| Alley, Terry G. | | Husband of the 1st cousin 6 times removed |
| Allie S. | | Wife of the 1st cousin 4 times removed |
| Almond, Adeline | | Wife of the 1st cousin 6 times removed |
| Almond, Samuel | | 3rd great-grandfather |
| Almond, Sarah | Bet. 1625 - 1635 | 2nd great-grandmother |
| Anderson, Carey | | Wife of the 1st cousin 7 times removed |
