| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 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, Richard | 26th great-grandfather | XXVIII | 28 |
| Half 4th cousin 26 times removed | XXXVI | 31 |
| 5th cousin 25 times removed | XXXVII | 31 |
| 5th cousin 27 times removed | XXXIX | 33 |
| 5th cousin 28 times removed | XL | 34 |
| Brewes, Robert | 24th great-granduncle | XXVIII | 27 |
| 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, Robert Shardeloes | 22nd great-grandfather | XXIV | 24 |
| Half 8th cousin 22 times removed | XL | 31 |
| 9th cousin 21 times removed | XLI | 31 |
| 9th cousin 23 times removed | XLIII | 33 |
| 9th cousin 24 times removed | XLIV | 34 |
| Husband of the 7th cousin 26 times removed | | |
| Husband of the 9th cousin 22 times removed | | |
| Brewes, Thomas Stapleton | 21st great-grandfather | XXIII | 23 |
| 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, William Calthorpe | 20th great-grandfather | XXII | 22 |
| Half 10th cousin 20 times removed | XLII | 31 |
| 11th cousin 19 times removed | XLIII | 31 |
| 9th cousin 24 times removed | XLIV | 34 |
| 11th cousin 20 times removed | XLIV | 32 |
| 11th cousin 21 times removed | XLV | 33 |
| 11th cousin 22 times removed | XLVI | 34 |
| Brews, Richard Rus | 25th great-granduncle | 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 |
| Brittany, Conan | 29th great-grandfather | XXXI | 31 |
| 27th great-granduncle | XXXI | 30 |
| 32nd great-grandfather | XXXIV | 34 |
| 30th great-granduncle | XXXIV | 33 |
| Bromfield, Margaret King | 9th great-grandmother | XI | 11 |
| Wife of the 10th cousin 8 times removed | | |
| Wife of the 9th cousin 11 times removed | | |
| Wife of the 9th cousin 12 times removed | | |
| Wife of the 10th cousin 11 times removed | | |
| Wife of the half 10th cousin 12 times removed | | |