| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 25th great-grandaunt | XXIX | 28 |
| 1st cousin 25 times removed | XXIX | 27 |
| 1st cousin 28 times removed | XXXII | 30 |
| Plantagenet, Margaret Wydeville | 18th great-grandaunt | XXII | 21 |
| Plantagenet, Mary Chaworth | 20th great-grandaunt | XXIV | 23 |
| 23rd great-grandaunt | XXVII | 26 |
| 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 |
| Plantagenet, Mary Wydeville | 18th great-grandaunt | XXII | 21 |
| Plantagenet, Matilda Or Maud Chaworth | 20th great-grandaunt | XXIV | 23 |
| 23rd great-grandaunt | XXVII | 26 |
| 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 |
| Plantagenet, Richard | 21st great-grandfather | XXIII | 23 |
| Plantagenet, Richard I | 24th great-granduncle | XXVIII | 27 |
| 27th great-granduncle | XXXI | 30 |
| Plantagenet, Richard Mortimer | 20th great-grandfather | XXII | 22 |
| Plantagenet, Richard Wydeville | 18th great-granduncle | XXII | 21 |
| Plantagenet, Thomas | 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, William | 24th great-granduncle | XXVIII | 27 |
| 27th great-granduncle | XXXI | 30 |
| Poppy, Alice | 18th great-grandmother | XX | 20 |
| Wife of the half 12th cousin 18 times removed | | |
| Wife of the 13th cousin 17 times removed | | |
| Wife of the 11th cousin 22 times removed | | |
| Wife of the 13th cousin 18 times removed | | |
| Wife of the 13th cousin 19 times removed | | |
| Wife of the 13th cousin 20 times removed | | |
| Porter, Elizabeth | 8th great-grandmother | X | 10 |
| Wife of the 8th cousin 9 times removed | | |
| Wife of the 7th cousin 11 times removed | | |
| Wife of the 8th cousin 10 times removed | | |
| Wife of the 8th cousin 13 times removed | | |
| Wife of the 9th cousin 12 times removed | | |
| Wife of the 11th cousin 8 times removed | | |