| Name | Relationship with Gilbert de Clare | Civil | Canon |
|---|
| Spray, Georgia | Wife of the 21st great-grandson | | |
| Stafford, Catherine | 3rd great-granddaughter | V | 5 |
| Stanley, Elizabeth | Wife of the 12th great-grandson | | |
| Starr, Anna A. | Wife of the 21st great-grandson | | |
| Stauffer, Elizabeth | Wife of the 20th great-grandson | | |
| Sterger, Alan Thomas | 23rd great-grandson | XXV | 25 |
| Sterger, Casimer | Husband of the 22nd great-granddaughter | | |
| Sterger, Leo | 23rd great-grandson | XXV | 25 |
| Sterger, Stephen Michael | 23rd great-grandson | XXV | 25 |
| Stratton, Achsah | Wife of the 18th great-grandson | | |
| Stratton, Sarah | Wife of the 18th great-grandson | | |
| Sullivan, Martha Ann | Wife of the 22nd great-grandson | | |
| Sutton, Cynthia Kathleen | 25th great-granddaughter | XXVII | 27 |
| Sutton, Debbie Arlene | 25th great-granddaughter | XXVII | 27 |
| Sutton, J. Alfred | Husband of the 21st great-granddaughter | | |
| Sutton, Janet Eileen | 25th great-granddaughter | XXVII | 27 |
| Sutton, John | Husband of the 3rd great-granddaughter | | |
| Sutton, Michael Woodrow | 25th great-grandson | XXVII | 27 |
| Sutton, Milo Wilton | Husband of the 24th great-granddaughter | | |
| Sutton, Rita Anne | 25th great-granddaughter | XXVII | 27 |
| Sutton, Wendy Doreen | 25th great-granddaughter | XXVII | 27 |
| Swarner, George Clarence | Husband of the 23rd great-granddaughter | | |
| Symonette, Ethel Maude | 21st great-granddaughter | XXIII | 23 |
| Symonette, Gertrude E. | 21st great-granddaughter | XXIII | 23 |
| Symonette, Horatio Johnston | Husband of the 20th great-granddaughter | | |
| Symonette, Mabel Louise | 21st great-granddaughter | XXIII | 23 |
| Taggert, Elizabeth | Wife of the 18th great-grandson | | |
| Tarrant, Ann | 19th great-granddaughter | XXI | 21 |
| Tarrant, Husband | Husband of the 18th great-granddaughter | | |
| Tarrant, Jane Wallace | 19th great-granddaughter | XXI | 21 |
| Tarrant, Sophia | 19th great-granddaughter | XXI | 21 |
| Tarrant, William | Husband of the 18th great-granddaughter | | |
| Taylor, Ellen Hill | 22nd great-granddaughter | XXIV | 24 |
| Taylor, Jane | Wife of the 22nd great-grandson | | |
| Taylor, Philip Sheridan | Husband of the 21st great-granddaughter | | |
| Taylor, Phyllis | 22nd great-granddaughter | XXIV | 24 |
| Thomas, Anna Frances | 21st great-granddaughter | XXIII | 23 |
| Thomas, Martha Mary | Wife of the 19th great-grandson | | |
| Thomas, Mary W. | Wife of the 20th great-grandson | | |
| Thomas, Rebecca Stevens | Wife of the 21st great-grandson | | |
| Thomas, Richard | Husband of the 20th great-granddaughter | | |
| Thomas, Richard | 21st great-grandson | XXIII | 23 |
| Thomas, Sarah Margaret | Wife of the 19th great-grandson | | |
| Thompson, Ann | Wife of the 18th great-grandson | | |
| Thompson, Christina | Wife of the 21st great-grandson | | |
| Thompson, Emilie D. | Wife of the 19th great-grandson | | |
| Thompson, Mary Carpenter | Wife of the 19th great-grandson | | |
| Thompson, Ralph | Husband of the 18th great-granddaughter | | |
| Thornburn, Catherine Isabella | 21st great-granddaughter | XXIII | 23 |
| Thornburn, Douglass Glendenning | 21st great-grandson | XXIII | 23 |
