| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 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, Joan Wake | 20th great-grandmother | XXII | 22 |
| 23rd great-grandmother | 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 |
| 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 |
| Wife of the 9th cousin 20 times removed | | |
| Wife of the 7th cousin 24 times removed | | |
| Wife of the 8th cousin 23 times removed | | |
| Wife of the 8th cousin 25 times removed | | |
| Wife of the 9th cousin 23 times removed | | |
| Wife of the 7th cousin 27 times removed | | |
| Plantagenet, John | 24th great-grandfather | XXVI | 26 |
| 27th great-grandfather | XXIX | 29 |
| Plantagenet, John Of Gaunt | 19th great-grandfather | XXI | 21 |
| 22nd great-grandfather | XXIV | 24 |
| 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, Katherine Wydeville | 18th great-grandaunt | XXII | 21 |
| Plantagenet, Lionel Of Antwerp | 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, Margaret Berenger | 22nd great-grandaunt | XXVI | 25 |