| Name | Relationship with Isabella de Taillefer | Civil | Canon |
|---|
| 23rd great-granddaughter | XXV | 25 |
| Taylor, Jane | Wife of the 22nd great-grandson | | |
| Wife of the 23rd great-grandson | | |
| Taylor, Philip Sheridan | Husband of the 21st great-granddaughter | | |
| Husband of the 22nd great-granddaughter | | |
| Taylor, Phyllis | 22nd great-granddaughter | XXIV | 24 |
| 23rd great-granddaughter | XXV | 25 |
| Thomas | Great-grandson | III | 3 |
| Thomas | Great-grandson | III | 3 |
| Thomas | 3rd great-grandson | V | 5 |
| Husband of the 5th great-granddaughter | | |
| Thomas | 5th great-grandson | VII | 7 |
| 6th great-grandson | VIII | 8 |
| Thomas, Anna Frances | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Thomas, Martha Mary | Wife of the 19th great-grandson | | |
| Wife of the 20th great-grandson | | |
| Thomas, Mary W. | Wife of the 20th great-grandson | | |
| Wife of the 21st great-grandson | | |
| Thomas, Rebecca Stevens | Wife of the 21st great-grandson | | |
| Wife of the 22nd great-grandson | | |
| Thomas, Richard | Husband of the 20th great-granddaughter | | |
| Husband of the 21st great-granddaughter | | |
| Thomas, Richard | 21st great-grandson | XXIII | 23 |
| 22nd great-grandson | XXIV | 24 |
| Thomas, Sarah Margaret | Wife of the 19th great-grandson | | |
| Wife of the 20th great-grandson | | |
| Thompson, Ann | Wife of the 18th great-grandson | | |
| Wife of the 19th great-grandson | | |
| Thompson, Christina | Wife of the 21st great-grandson | | |
| Wife of the 22nd great-grandson | | |
| Thompson, Emilie D. | Wife of the 19th great-grandson | | |
| Wife of the 20th great-grandson | | |
| Thompson, Mary Carpenter | Wife of the 19th great-grandson | | |
| Wife of the 20th great-grandson | | |
| Thompson, Ralph | Husband of the 18th great-granddaughter | | |
| Husband of the 19th great-granddaughter | | |
| Thornburn, Catherine Isabella | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Thornburn, Douglass Glendenning | 21st great-grandson | XXIII | 23 |
| 22nd great-grandson | XXIV | 24 |
| Thornburn, Jean Wilson | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Thornburn, Robert | Husband of the 20th great-granddaughter | | |
| Husband of the 21st great-granddaughter | | |
| Thornton, Kelsie Dyan | 26th great-granddaughter | XXVIII | 28 |
| 27th great-granddaughter | XXIX | 29 |
| Thornton, Lacie Cheyenne | 26th great-granddaughter | XXVIII | 28 |
| 27th great-granddaughter | XXIX | 29 |
| Thornton, Stephanie LeAnn | Wife of the 25th great-grandson | | |
