| Name | Relationship with Michael Biddulph | Civil | Canon |
| Biddulph, Rachel | 6th great-grandaunt | X | 9 |
| Biddulph, Richard | 11th great-granduncle | XV | 14 |
| Husband of the 14th great-grandaunt | | |
| Biddulph, Sean Gregory | Brother | II | 1 |
| 11th cousin once removed | XXV | 13 |
| 12th cousin once removed | XXVII | 14 |
| Biddulph, Simon | 3rd great-granduncle | VII | 6 |
| 7th cousin 4 times removed | XX | 12 |
| 6th cousin 6 times removed | XX | 13 |
| 7th cousin 6 times removed | XXII | 14 |
| 8th cousin 4 times removed | XXII | 13 |
| Biddulph, Simon | 10th great-grandfather | XII | 12 |
| Biddulph, Simon | 9th great-grandfather | XI | 11 |
| Biddulph, Simon | 6th great-grandfather | VIII | 8 |
| Husband of the 4th cousin 7 times removed | | |
| Husband of the 3rd cousin 9 times removed | | |
| Biddulph, Simon | 4th great-grandfather | VI | 6 |
| 6th cousin 5 times removed | XIX | 12 |
| 5th cousin 7 times removed | XIX | 13 |
| Husband of the 6th cousin 7 times removed | | |
| Husband of the 7th cousin 5 times removed | | |
| Biddulph, Stuart Royden | Granduncle | IV | 3 |
| 10th cousin once removed | XXIII | 12 |
| 9th cousin 3 times removed | XXIII | 13 |
| 10th cousin 3 times removed | XXV | 14 |
| 11th cousin once removed | XXV | 13 |
| Biddulph, Susanna | 6th great-grandaunt | X | 9 |
| Biddulph, Susanna | 5th great-grandaunt | IX | 8 |
| 5th cousin 6 times removed | XVIII | 12 |
| 4th cousin 8 times removed | XVIII | 13 |
| Biddulph, Susannah | 4th great-grandaunt | VIII | 7 |
| 6th cousin 5 times removed | XIX | 12 |
| 5th cousin 7 times removed | XIX | 13 |
| Biddulph, Symon | 11th great-grandfather | XIII | 13 |
| Biddulph, Theophilus | 7th great-grandfather | IX | 9 |
| Biddulph, Theophilus | 6th great-granduncle | X | 9 |
| Biddulph, Theophilus | 5th great-granduncle | IX | 8 |
| 5th cousin 6 times removed | XVIII | 12 |
| 4th cousin 8 times removed | XVIII | 13 |
| Biddulph, Theophilus Burnet | Great-granduncle | V | 4 |
| 9th cousin twice removed | XXII | 12 |
| 8th cousin 4 times removed | XXII | 13 |
| 9th cousin 4 times removed | XXIV | 14 |
| 10th cousin twice removed | XXIV | 13 |
| Biddulph, Thomas | 5th great-granduncle | IX | 8 |
| 5th cousin 6 times removed | XVIII | 12 |
| 4th cousin 8 times removed | XVIII | 13 |
| Biddulph, Thomas | 2nd great-granduncle | VI | 5 |
| 8th cousin 3 times removed | XXI | 12 |
| 7th cousin 5 times removed | XXI | 13 |