| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Wife of the 11th cousin 20 times removed | | |
| Wife of the 10th cousin 22 times removed | | |
| Wife of the 11th cousin 21 times removed | | |
| Wife of the 10th cousin 23 times removed | | |
| Borthwick, Janet | 19th great-grandaunt | XXIII | 22 |
| 1st cousin 22 times removed | XXVI | 24 |
| Borthwick, Margaret | 18th great-grandaunt | XXII | 21 |
| 2nd cousin 21 times removed | XXVII | 24 |
| Borthwick, Thomas | 22nd great-grandfather | XXIV | 24 |
| 23rd great-grandfather | XXV | 25 |
| Borthwick, William | 18th great-granduncle | XXII | 21 |
| 2nd cousin 21 times removed | XXVII | 24 |
| Borthwick, William | 21st great-grandfather | XXIII | 23 |
| 22nd great-grandfather | XXIV | 24 |
| Borthwick, William | 20th great-grandfather | XXII | 22 |
| 21st great-granduncle | XXV | 24 |
| Borthwick, William | 19th great-grandfather | XXI | 21 |
| 1st cousin 22 times removed | XXVI | 24 |
| Bosco, Jane | 23rd great-grandmother | XXV | 25 |
| Bosco, Matthew Wood | 24th great-grandfather | XXVI | 26 |
| Bourne, Godiva Evemer | 31st great-grandmother | XXXIII | 33 |
| Bourne, Thurfrida | 32nd great-grandmother | XXXIV | 34 |
| Box, Martha | 17th great-grandmother | XIX | 19 |
| Box, William | 18th great-grandfather | XX | 20 |
| Boyd, Margaret Montgomery | 18th great-grandmother | XX | 20 |
| 1st cousin 21 times removed | XXV | 23 |
| 3rd cousin 17 times removed | XXV | 21 |
| Half 3rd cousin 18 times removed | XXVI | 22 |
| 2nd cousin 21 times removed | XXVII | 24 |
| Half 3rd cousin 19 times removed | XXVII | 23 |
| 4th cousin 17 times removed | XXVII | 22 |
| Half 3rd cousin 20 times removed | XXVIII | 24 |
| 4th cousin 18 times removed | XXVIII | 23 |
| Half 3rd cousin 21 times removed | XXIX | 25 |
| 4th cousin 19 times removed | XXIX | 24 |
| 5th cousin 18 times removed | XXX | 24 |
| 4th cousin 20 times removed | XXX | 25 |
| 5th cousin 19 times removed | XXXI | 25 |
| 4th cousin 21 times removed | XXXI | 26 |
| 6th cousin 18 times removed | XXXII | 25 |
| 7th cousin 16 times removed | XXXII | 24 |
| 5th cousin 20 times removed | XXXII | 26 |
| 7th cousin 17 times removed | XXXIII | 25 |
| 5th cousin 21 times removed | XXXIII | 27 |
| 6th cousin 19 times removed | XXXIII | 26 |
| 6th cousin 20 times removed | XXXIV | 27 |
| 7th cousin 18 times removed | XXXIV | 26 |
| 8th cousin 16 times removed | XXXIV | 25 |
| 7th cousin 19 times removed | XXXV | 27 |
| 9th cousin 15 times removed | XXXV | 25 |