| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Braose, William | 30th great-grandfather | XXXII | 32 |
| Braose, William | 28th great-grandfather | XXX | 30 |
| Husband of the half 2nd cousin 28 times removed | | |
| Husband of the 3rd cousin 27 times removed | | |
| Husband of the 3rd cousin 29 times removed | | |
| Husband of the 3rd cousin 30 times removed | | |
| Braose, William Fitzwalter | 29th great-grandfather | XXXI | 31 |
| Bretagne, Constance England | 28th great-grandmother | XXX | 30 |
| 1st cousin 28 times removed | XXXII | 30 |
| 31st great-grandmother | XXXIII | 33 |
| 1st cousin 31 times removed | XXXV | 33 |
| Bretagne, Hawise | 29th great-grandmother | XXXI | 31 |
| 31st great-grandmother | XXXIII | 33 |
| 32nd great-grandmother | XXXIV | 34 |
| 34th great-grandmother | XXXVI | 36 |
| Brewes, Anne Hopton | 19th great-grandmother | XXI | 21 |
| Half 11th cousin 19 times removed | XLIII | 31 |
| 12th cousin 18 times removed | XLIV | 31 |
| 10th cousin 23 times removed | XLV | 34 |
| 12th cousin 19 times removed | XLV | 32 |
| 12th cousin 20 times removed | XLVI | 33 |
| 12th cousin 21 times removed | XLVII | 34 |
| Brewes, Gilbert Rus | 25th great-grandfather | XXVII | 27 |
| Half 5th cousin 25 times removed | XXXVII | 31 |
| 6th cousin 24 times removed | XXXVIII | 31 |
| 6th cousin 26 times removed | XL | 33 |
| 6th cousin 27 times removed | XLI | 34 |
| Brewes, John | 24th great-grandfather | XXVI | 26 |
| Half 6th cousin 24 times removed | XXXVIII | 31 |
| 7th cousin 23 times removed | XXXIX | 31 |
| 7th cousin 25 times removed | XLI | 33 |
| 7th cousin 26 times removed | XLII | 34 |
| Brewes, John Ufford | 23rd great-grandfather | XXV | 25 |
| Half 7th cousin 23 times removed | XXXIX | 31 |
| 8th cousin 22 times removed | XL | 31 |
| 8th cousin 24 times removed | XLII | 33 |
| 8th cousin 25 times removed | XLIII | 34 |
| Brewes, Margaret Rus | 25th great-grandaunt | XXIX | 28 |
| Half 5th cousin 25 times removed | XXXVII | 31 |
| 6th cousin 24 times removed | XXXVIII | 31 |
| 6th cousin 26 times removed | XL | 33 |
| 6th cousin 27 times removed | XLI | 34 |
| Brewes, Margaret Stapleton | 21st great-grandaunt | XXV | 24 |
| Half 9th cousin 21 times removed | XLI | 31 |
| 10th cousin 20 times removed | XLII | 31 |
| 8th cousin 25 times removed | XLIII | 34 |
| 10th cousin 21 times removed | XLIII | 32 |
| 10th cousin 22 times removed | XLIV | 33 |
| 10th cousin 23 times removed | XLV | 34 |
| Brewes, Richard | 24th great-granduncle | XXVIII | 27 |