| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 1st cousin 26 times removed | XXX | 28 |
| 27th great-granduncle | XXXI | 30 |
| 4th cousin 24 times removed | XXXIV | 29 |
| 4th cousin 25 times removed | XXXV | 30 |
| 4th cousin 26 times removed | XXXVI | 31 |
| 4th cousin 27 times removed | XXXVII | 32 |
| 4th cousin 28 times removed | XXXVIII | 33 |
| MacDowall, Duncan | 24th great-grandfather | XXVI | 26 |
| 25th great-grandfather | XXVII | 27 |
| 26th great-grandfather | XXVIII | 28 |
| 27th great-grandfather | XXIX | 29 |
| 28th great-grandfather | XXX | 30 |
| 29th great-grandfather | XXXI | 31 |
| MacDowall, Fergus | 26th great-grandfather | XXVIII | 28 |
| 27th great-grandfather | XXIX | 29 |
| 28th great-grandfather | XXX | 30 |
| 29th great-grandfather | XXXI | 31 |
| 30th great-grandfather | XXXII | 32 |
| 31st great-grandfather | XXXIII | 33 |
| MacDowall, Gilbert | 25th great-grandfather | XXVII | 27 |
| 26th great-grandfather | XXVIII | 28 |
| 27th great-grandfather | XXIX | 29 |
| 28th great-grandfather | XXX | 30 |
| 29th great-grandfather | XXXI | 31 |
| 30th great-grandfather | XXXII | 32 |
| MacDowall, Marjorie Stewart | 22nd great-grandmother | XXIV | 24 |
| 23rd great-grandmother | XXV | 25 |
| 24th great-grandmother | XXVI | 26 |
| 25th great-grandmother | XXVII | 27 |
| 1st cousin 23 times removed | XXVII | 25 |
| 26th great-grandmother | XXVIII | 28 |
| 1st cousin 24 times removed | XXVIII | 26 |
| 27th great-grandmother | XXIX | 29 |
| 1st cousin 25 times removed | XXIX | 27 |
| 1st cousin 26 times removed | XXX | 28 |
| 4th cousin 24 times removed | XXXIV | 29 |
| 4th cousin 25 times removed | XXXV | 30 |
| 4th cousin 26 times removed | XXXVI | 31 |
| 4th cousin 27 times removed | XXXVII | 32 |
| 4th cousin 28 times removed | XXXVIII | 33 |
| MacDowall, Neil | 23rd great-grandfather | XXV | 25 |
| 24th great-grandfather | XXVI | 26 |
| 25th great-grandfather | XXVII | 27 |
| 26th great-grandfather | XXVIII | 28 |
| 27th great-grandfather | XXIX | 29 |
| 28th great-grandfather | XXX | 30 |
| Husband of the 22nd great-grandaunt | | |
| Husband of the 23rd great-grandaunt | | |
| Husband of the 24th great-grandaunt | | |
| Husband of the 25th great-grandaunt | | |