| Name | Relationship with Isabella de Taillefer | Civil | Canon |
|---|
| Philippa | 5th great-granddaughter | VII | 7 |
| 6th great-granddaughter | VIII | 8 |
| Pichon, Delia | Wife of the 22nd great-grandson | | |
| Wife of the 23rd great-grandson | | |
| Plantagenet, Antigone | 6th great-granddaughter | VIII | 8 |
| 7th great-granddaughter | IX | 9 |
| Wife of the 6th great-grandson | | |
| Wife of the 7th great-grandson | | |
| Pleasants, Anne | Wife of the 20th great-grandson | | |
| Wife of the 21st great-grandson | | |
| Plummer, Bessy Allison | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Plummer, David Allison | 21st great-grandson | XXIII | 23 |
| 22nd great-grandson | XXIV | 24 |
| Plummer, Isabella Campbell | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Plummer, John | Husband of the 20th great-granddaughter | | |
| Husband of the 21st great-granddaughter | | |
| Plummer, John | 21st great-grandson | XXIII | 23 |
| 22nd great-grandson | XXIV | 24 |
| Pollock, Ruby Edith | Wife of the 21st great-grandson | | |
| Wife of the 22nd great-grandson | | |
| Potts, Sarah Rhoads | 22nd great-granddaughter | XXIV | 24 |
| 23rd great-granddaughter | XXV | 25 |
| Potts, Thomas Charles | Husband of the 21st great-granddaughter | | |
| Husband of the 22nd great-granddaughter | | |
| Potts, Thomas Isaac | 22nd great-grandson | XXIV | 24 |
| 23rd great-grandson | XXV | 25 |
| Powell, Charles Worth | 20th great-grandson | XXII | 22 |
| 21st great-grandson | XXIII | 23 |
| Powell, Edith | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Powell, Ellen Catherwood | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Powell, Ellen Evans | 20th great-granddaughter | XXII | 22 |
| 21st great-granddaughter | XXIII | 23 |
| Powell, Florence | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Powell, Frances | 22nd great-grandson | XXIV | 24 |
| 23rd great-grandson | XXV | 25 |
| Powell, Hannah Edith | 20th great-granddaughter | XXII | 22 |
| 21st great-granddaughter | XXIII | 23 |
| Powell, Harriet | 21st great-granddaughter | XXIII | 23 |
| 22nd great-granddaughter | XXIV | 24 |
| Powell, Howard Milnor | 20th great-grandson | XXII | 22 |
| 21st great-grandson | XXIII | 23 |
| Powell, Howard Palmer | 22nd great-grandson | XXIV | 24 |
| 23rd great-grandson | XXV | 25 |
| Powell, Laura | 20th great-granddaughter | XXII | 22 |
| 21st great-granddaughter | XXIII | 23 |
