| Name | Relationship with Isabella de Taillefer | Civil | Canon |
| de Amory, Roger | Husband of the 2nd great-granddaughter | | |
| de Audley, Alice | Wife of the 3rd great-grandson | | |
| de Audley, Hugh | Husband of the 2nd great-granddaughter | | |
| de Audley, Margaret | 3rd great-granddaughter | V | 5 |
| de Badlesmere, Elizabeth | Wife of the 2nd great-grandson | | |
| de Bayern, William | Husband of the 3rd great-granddaughter | | |
| de Beauchamp, Philippa | Wife of the 4th great-grandson | | |
| de Beaufort, Elizabeth | 4th great-granddaughter | VI | 6 |
| Wife of the 3rd great-grandson | | |
| de Beaufort, John | 4th great-grandson | VI | 6 |
| Husband of the 4th great-granddaughter | | |
| de Beaufort, Margaret | Wife of the 3rd great-grandson | | |
| de Beaumont, Isabella | Wife of the 2nd great-grandson | | |
| de Beaumont, John | Husband of the 2nd great-granddaughter | | |
| de Berkeley, Maurice | Son-in-law | | |
| de Bohun, Agnes | 2nd great-granddaughter | IV | 4 |
| de Bohun, Eleanor | 2nd great-granddaughter | IV | 4 |
| de Bohun, Eleanor | 5th great-granddaughter | VII | 7 |
| Wife of the 3rd great-grandson | | |
| de Bohun, Elizabeth | 3rd great-granddaughter | V | 5 |
| Wife of the 3rd great-grandson | | |
| de Bohun, Humphrey | Husband of the great-granddaughter | | |
| de Bohun, Humphrey | 3rd great-grandson | V | 5 |
| de Bohun, Humphrey | 4th great-grandson | VI | 6 |
| de Bohun, John | 2nd great-grandson | IV | 4 |
| de Bohun, Margaret | 2nd great-granddaughter | IV | 4 |
| de Bohun, Mary | 5th great-granddaughter | VII | 7 |
| Wife of the 4th great-grandson | | |
| de Bohun, William | 2nd great-grandson | IV | 4 |
| de Bohun, William | 3rd great-grandson | V | 5 |
| de Burgh, Elizabeth | 3rd great-granddaughter | V | 5 |
| 4th great-granddaughter | VI | 6 |
| Wife of the 3rd great-grandson | | |
| de Burgh, John | Husband of the 2nd great-granddaughter | | |
| de Burgh, William | 3rd great-grandson | V | 5 |
| Husband of the 2nd great-granddaughter | | |
| de Chatworth, Maud | Wife of the great-grandson | | |
| de Cherleton, Edward | 5th great-grandson | VII | 7 |
| Husband of the 4th great-granddaughter | | |
| de Cherleton, Joan | 5th great-granddaughter | VII | 7 |
| 6th great-granddaughter | VIII | 8 |
| de Cherleton, John | Husband of the 4th great-granddaughter | | |
| de Cherlton, Joyce | 5th great-granddaughter | VII | 7 |
| 6th great-granddaughter | VIII | 8 |
| de Clare, Eleanor | 2nd great-granddaughter | IV | 4 |
| de Clare, Elizabeth | 2nd great-granddaughter | IV | 4 |
| de Clare, Gilbert | Ex-husband of the granddaughter | | |
| Husband of the great-granddaughter | | |
| de Clare, Gilbert | 2nd great-grandson | IV | 4 |
| de Clare, Margaret | 2nd great-granddaughter | IV | 4 |