| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Half 2nd cousin 25 times removed | XXXI | 28 |
| 4th cousin 21 times removed | XXXI | 26 |
| 2nd cousin 25 times removed | XXXI | 28 |
| 3rd cousin 23 times removed | XXXI | 27 |
| 4th cousin 24 times removed | XXXIV | 29 |
| 3rd cousin 26 times removed | XXXIV | 30 |
| Plantagenet, Edward Wydeville | 18th great-granduncle | XXII | 21 |
| Plantagenet, Eleanor Chaworth | 20th great-grandmother | XXII | 22 |
| 23rd great-grandmother | XXV | 25 |
| 2nd cousin 22 times removed | XXVIII | 25 |
| 3rd cousin 23 times removed | XXXI | 27 |
| 2nd cousin 25 times removed | XXXI | 28 |
| 3rd cousin 26 times removed | XXXIV | 30 |
| Wife of the 7th cousin 22 times removed | | |
| Wife of the 7th cousin 23 times removed | | |
| Wife of the 7th cousin 24 times removed | | |
| Plantagenet, Eleanor Or Leanora | 24th great-grandaunt | XXVIII | 27 |
| 27th great-grandaunt | XXXI | 30 |
| Plantagenet, Elizabeth | 21st great-grandaunt | XXV | 24 |
| Half 21st great-grandaunt | XXV | 24 |
| 1st cousin 23 times removed | XXVII | 25 |
| 24th great-grandaunt | XXVIII | 27 |
| Half 24th great-grandaunt | XXVIII | 27 |
| 1st cousin 26 times removed | XXX | 28 |
| 2nd cousin 24 times removed | XXX | 27 |
| 2nd cousin 27 times removed | XXXIII | 30 |
| Plantagenet, Elizabeth Wydeville | 18th great-grandmother | XX | 20 |
| Plantagenet, Geoffrey | 26th great-grandfather | XXVIII | 28 |
| 29th great-grandfather | XXXI | 31 |
| Plantagenet, Geoffrey | 24th great-granduncle | XXVIII | 27 |
| 27th great-granduncle | XXXI | 30 |
| Plantagenet, George Wydeville | 18th great-granduncle | XXII | 21 |
| Plantagenet, Henry | 24th great-granduncle | XXVIII | 27 |
| 27th great-granduncle | XXXI | 30 |
| Plantagenet, Henry Capet | 21st great-grandfather | XXIII | 23 |
| 24th great-grandfather | XXVI | 26 |
| 1st cousin 23 times removed | XXVII | 25 |
| 2nd cousin 24 times removed | XXX | 27 |
| 1st cousin 26 times removed | XXX | 28 |
| 2nd cousin 27 times removed | XXXIII | 30 |
| Plantagenet, Henry II | 25th great-grandfather | XXVII | 27 |
| 28th great-grandfather | XXX | 30 |
| Plantagenet, Henry III | 23rd great-grandfather | XXV | 25 |
| 26th great-grandfather | XXVIII | 28 |
| Husband of the 24th great-grandaunt | | |
| Husband of the 27th great-grandaunt | | |
| Plantagenet, Joan | 21st great-grandaunt | XXV | 24 |
| Half 21st great-grandaunt | XXV | 24 |
| 1st cousin 23 times removed | XXVII | 25 |
| 24th great-grandaunt | XXVIII | 27 |