| Name | Relationship with Susan Foster | Civil | Canon |
| Harrison, Minnie Lou | Wife of the half 3rd cousin twice removed | | |
| Harvey, Jasper G. | Husband of the half 3rd cousin twice removed | | |
| Hendrix, Nancy | Wife of the half 3rd cousin twice removed | | |
| Herrin, James E. | Husband of the half 3rd cousin twice removed | | |
| Herrin, Malissie | Wife of the 1st cousin 3 times removed | | |
| Herrin, Sherod L. | Husband of the 1st cousin 3 times removed | | |
| Hickox, James | Husband of the 1st cousin 4 times removed | | |
| Highsmith, Aaron | 2nd great-granduncle | VI | 5 |
| Husband of the 1st cousin 4 times removed | | |
| Highsmith, Allen Clay | Half 1st cousin 4 times removed | VIII | 6 |
| Highsmith, Amanda E. | Half 1st cousin 4 times removed | VIII | 6 |
| Highsmith, Ann | Half 1st cousin 4 times removed | VIII | 6 |
| Highsmith, Burrell | 1st cousin 3 times removed | VII | 5 |
| Highsmith, Catherine | 1st cousin 4 times removed | VIII | 6 |
| Highsmith, Curtis | 1st cousin 3 times removed | VII | 5 |
| Highsmith, Daniel | 4th great-granduncle | VIII | 7 |
| Highsmith, Daniel | 2nd great-granduncle | VI | 5 |
| Highsmith, David | 3rd great-grandfather | V | 5 |
| Highsmith, David | 2nd great-granduncle | VI | 5 |
| Highsmith, David Warren | 1st cousin 3 times removed | VII | 5 |
| Highsmith, Donnie | 2nd cousin | VI | 3 |
| Highsmith, Dorcas | 4th great-grandaunt | VIII | 7 |
| Highsmith, Eliza | 1st cousin 3 times removed | VII | 5 |
| 2nd cousin 3 times removed | IX | 6 |
| Highsmith, Elizabeth | Half 3rd great-grandaunt | VII | 6 |
| Highsmith, Emma | Grandaunt | IV | 3 |
| Highsmith, Erastus | Half 1st cousin 4 times removed | VIII | 6 |
| Highsmith, Frances Victoria | 1st cousin 3 times removed | VII | 5 |
| Highsmith, Gail | 2nd cousin | VI | 3 |
| Highsmith, Gatsey | Half 1st cousin 4 times removed | VIII | 6 |
| Highsmith, Genva | Grandaunt | IV | 3 |
| Highsmith, George W. | Half 1st cousin 4 times removed | VIII | 6 |
| Husband of the 1st cousin 3 times removed | | |
| Highsmith, H. Duncan | Half 1st cousin 4 times removed | VIII | 6 |
| Highsmith, Harriet | Half 1st cousin 4 times removed | VIII | 6 |
| Highsmith, Henry | Half 3rd great-granduncle | VII | 6 |
| Highsmith, Henry Clay | Half 1st cousin 4 times removed | VIII | 6 |
| Highsmith, Henry Gale | Half 2nd cousin 3 times removed | IX | 6 |
| Highsmith, Henry H. | Half 1st cousin 4 times removed | VIII | 6 |
| Highsmith, Isaac | 4th great-granduncle | VIII | 7 |
| Highsmith, Isaac | 3rd great-granduncle | VII | 6 |
| Highsmith, Isaac H. | 2nd great-granduncle | VI | 5 |
| Highsmith, J. W. | 2nd cousin 3 times removed | IX | 6 |
| Highsmith, Jacob | 4th great-grandfather | VI | 6 |
| Highsmith, Jacob | 3rd great-granduncle | VII | 6 |
| Highsmith, Jacob | 1st cousin 4 times removed | VIII | 6 |
| Highsmith, Jacob B. | Half 1st cousin 4 times removed | VIII | 6 |
| Highsmith, James | Granduncle | IV | 3 |
| Highsmith, James | 1st cousin once removed | V | 3 |
| Highsmith, James | Half 3rd great-granduncle | VII | 6 |