| Name | Relationship with Isabella de Taillefer | Civil | Canon |
| de Coucy, Enguerrand | Husband of the 3rd great-granddaughter | | |
| de Courtenay, Hugh | Husband of the 2nd great-granddaughter | | |
| de Courtenay, Hugh | Husband of the 3rd great-granddaughter | | |
| de Eresby, William | Husband of the 3rd great-granddaughter | | |
| de Ferrers, Robert | Husband of the 2nd great-granddaughter | | |
| de Fortibus, Avelina | Wife of the grandson | | |
| de Gaveston, Piers | Husband of the 2nd great-granddaughter | | |
| de Grey, Elizabeth | 7th great-granddaughter | IX | 9 |
| 8th great-granddaughter | X | 10 |
| de Grey, Henry | 6th great-grandson | VIII | 8 |
| 7th great-grandson | IX | 9 |
| Husband of the 6th great-granddaughter | | |
| Husband of the 7th great-granddaughter | | |
| de Grey, John | Husband of the 5th great-granddaughter | | |
| Husband of the 6th great-granddaughter | | |
| de Hainault, Philippa | Wife of the 2nd great-grandson | | |
| de Holland, Eleanor | 4th great-granddaughter | VI | 6 |
| Wife of the 5th great-grandson | | |
| de Holland, Elizabeth | 3rd great-granddaughter | V | 5 |
| de Holland, Joan | 3rd great-granddaughter | V | 5 |
| Wife of the 3rd great-grandson | | |
| de Holland, John | 3rd great-grandson | V | 5 |
| Husband of the 4th great-granddaughter | | |
| de Holland, Margaret | 4th great-granddaughter | VI | 6 |
| Wife of the 4th great-grandson | | |
| de Holland, Maud | 3rd great-granddaughter | V | 5 |
| de Holland, Thomas | Husband of the 2nd great-granddaughter | | |
| de Holland, Thomas | 3rd great-grandson | V | 5 |
| Husband of the 3rd great-granddaughter | | |
| Husband of the 4th great-granddaughter | | |
| de Lacy, Alice | Wife of the great-grandson | | |
| de Lusignan, Alice | Daughter | I | 1 |
| de Luxembourg, Jacquetta | Wife of the 5th great-grandson | | |
| Wife of the 6th great-grandson | | |
| de Maltravers, Eleanor | Wife of the 3rd great-grandson | | |
| de Montacute, William | Husband of the 2nd great-granddaughter | | |
| de Montford, John | Husband of the 3rd great-granddaughter | | |
| de Monthermer, Ralph | Husband of the great-granddaughter | | |
| de Mortimer, Beatrice | Wife of the 2nd great-grandson | | |
| de Mortimer, Roger | Husband of the 4th great-granddaughter | | |
| de Mortimer, William | Husband of the 2nd great-granddaughter | | |
| de Mowbray, John | Husband of the 2nd great-granddaughter | | |
| de Munchensi, Joan | Daughter-in-law | | |
| de Neville, John | Husband of the 3rd great-granddaughter | | |
| de Percy, Henry | Husband of the granddaughter | | |
| de Percy, Henry | Great-grandson | III | 3 |
| de Percy, Henry | Husband of the 2nd great-granddaughter | | |
| de Provence, Eleanor | Daughter-in-law | | |
| de Roelt, Catherine | Wife of the 3rd great-grandson | | |
| de Salisbury, Thomas | Husband of the 4th great-granddaughter | | |