| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Half 1st cousin 23 times removed | XXVII | 25 |
| 1st cousin 23 times removed | XXVII | 25 |
| Half 24th great-granduncle | XXVIII | 27 |
| Half 1st cousin 26 times removed | XXX | 28 |
| 3rd cousin 22 times removed | XXX | 26 |
| 1st cousin 26 times removed | XXX | 28 |
| 2nd cousin 24 times removed | XXX | 27 |
| 3rd cousin 25 times removed | XXXIII | 29 |
| 2nd cousin 27 times removed | XXXIII | 30 |
| Plantagenet, Edward | 19th great-granduncle | XXIII | 22 |
| 22nd great-granduncle | XXVI | 25 |
| Half 2nd cousin 21 times removed | XXVII | 24 |
| Half 3rd cousin 21 times removed | XXIX | 25 |
| 3rd cousin 21 times removed | XXIX | 25 |
| Half 2nd cousin 24 times removed | XXX | 27 |
| Half 3rd cousin 24 times removed | XXXII | 28 |
| 5th cousin 20 times removed | XXXII | 26 |
| 3rd cousin 24 times removed | XXXII | 28 |
| 4th cousin 22 times removed | XXXII | 27 |
| 5th cousin 23 times removed | XXXV | 29 |
| 4th cousin 25 times removed | XXXV | 30 |
| Plantagenet, Edward | 19th great-grandfather | XXI | 21 |
| Plantagenet, Edward I Bereneger | 22nd great-grandfather | XXIV | 24 |
| 22nd great-granduncle | XXVI | 25 |
| 25th great-grandfather | XXVII | 27 |
| 25th great-granduncle | XXIX | 28 |
| 1st cousin 25 times removed | XXIX | 27 |
| 1st cousin 28 times removed | XXXII | 30 |
| Husband of the half 22nd great-grandaunt | | |
| Husband of the half 25th great-grandaunt | | |
| Husband of the 2nd cousin 23 times removed | | |
| Husband of the 2nd cousin 26 times removed | | |
| Plantagenet, Edward II | 21st great-grandfather | XXIII | 23 |
| Half 21st great-granduncle | XXV | 24 |
| 24th great-grandfather | XXVI | 26 |
| 1st cousin 23 times removed | XXVII | 25 |
| Half 24th great-granduncle | XXVIII | 27 |
| 1st cousin 26 times removed | XXX | 28 |
| 2nd cousin 24 times removed | XXX | 27 |
| 2nd cousin 27 times removed | XXXIII | 30 |
| Husband of the half 1st cousin 23 times removed | | |
| Husband of the half 1st cousin 26 times removed | | |
| Husband of the 3rd cousin 22 times removed | | |
| Husband of the 3rd cousin 25 times removed | | |
| Plantagenet, Edward III Capet | 20th great-grandfather | XXII | 22 |
| 23rd great-grandfather | XXV | 25 |
| Half 1st cousin 22 times removed | XXVI | 24 |
| Half 2nd cousin 22 times removed | XXVIII | 25 |
| 2nd cousin 22 times removed | XXVIII | 25 |
| Half 1st cousin 25 times removed | XXIX | 27 |