| Name | Relationship with Isabella de Taillefer | Civil | Canon |
|---|
| Powell, Mabel | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Powell, Mary | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Powell, Mary Gibbs | 20th great-granddaughter | XXII | 22 |
| 21st great-granddaughter | XXIII | 23 |
| Powell, Preston | 21st great-grandson | XXIII | 23 |
| 22nd great-grandson | XXIV | 24 |
| Powell, Preston Firth | 20th great-grandson | XXII | 22 |
| 21st great-grandson | XXIII | 23 |
| Powell, Reuben | 21st great-grandson | XXIII | 23 |
| 22nd great-grandson | XXIV | 24 |
| Powell, Richard | Husband of the 19th great-granddaughter | | |
| Husband of the 20th great-granddaughter | | |
| Powell, Richard | 21st great-grandson | XXIII | 23 |
| 22nd great-grandson | XXIV | 24 |
| Powell, Richard McClean | 20th great-grandson | XXII | 22 |
| 21st great-grandson | XXIII | 23 |
| Powell, Ruth Firth | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Powell, Sarah Ann | 20th great-granddaughter | XXII | 22 |
| 21st great-granddaughter | XXIII | 23 |
| Powell, Sarah Jane | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Powell, Warren A. | 21st great-grandson | XXIII | 23 |
| 22nd great-grandson | XXIV | 24 |
| Preston, Albert W. | Husband of the 20th great-granddaughter | | |
| Husband of the 21st great-granddaughter | | |
| Preston, Hannah | 15th great-granddaughter | XVII | 17 |
| 16th great-granddaughter | XVIII | 18 |
| Preston, Lloyd | 15th great-grandson | XVII | 17 |
| 16th great-grandson | XVIII | 18 |
| Preston, Margaret | 15th great-granddaughter | XVII | 17 |
| 16th great-granddaughter | XVIII | 18 |
| Preston, Mary | 15th great-granddaughter | XVII | 17 |
| 16th great-granddaughter | XVIII | 18 |
| Preston, Samuel | Husband of the 14th great-granddaughter | | |
| Husband of the 15th great-granddaughter | | |
| Preston, Samuel | Husband of the 14th great-granddaughter | | |
| Husband of the 15th great-granddaughter | | |
| Puzey, Ronna Lynn | Wife of the 23rd great-grandson | | |
| Wife of the 24th great-grandson | | |
| Pyecroft, Arthur | Husband of the 21st great-granddaughter | | |
| Husband of the 22nd great-granddaughter | | |
| Raaen, Gertrude Gsnhild | 22nd great-granddaughter | XXIV | 24 |
| 23rd great-granddaughter | XXV | 25 |
| Raaen, John Carpenter | 22nd great-grandson | XXIV | 24 |
| 23rd great-grandson | XXV | 25 |
| Raaen, Thomas Olsen | Husband of the 21st great-granddaughter | | |
| Husband of the 22nd great-granddaughter | | |
