| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Half 5th cousin 18 times removed | XXX | 24 |
| 6th cousin 17 times removed | XXXI | 24 |
| Half 5th cousin 19 times removed | XXXI | 25 |
| 6th cousin 18 times removed | XXXII | 25 |
| 7th cousin 16 times removed | XXXII | 24 |
| 6th cousin 19 times removed | XXXIII | 26 |
| 7th cousin 17 times removed | XXXIII | 25 |
| 6th cousin 20 times removed | XXXIV | 27 |
| 8th cousin 16 times removed | XXXIV | 25 |
| 7th cousin 18 times removed | XXXIV | 26 |
| 6th cousin 21 times removed | XXXV | 28 |
| 7th cousin 19 times removed | XXXV | 27 |
| 8th cousin 17 times removed | XXXV | 26 |
| 6th cousin 22 times removed | XXXVI | 29 |
| 8th cousin 18 times removed | XXXVI | 27 |
| 7th cousin 21 times removed | XXXVII | 29 |
| 8th cousin 19 times removed | XXXVII | 28 |
| 8th cousin 20 times removed | XXXVIII | 29 |
| 8th cousin 21 times removed | XXXIX | 30 |
| 8th cousin 22 times removed | XL | 31 |
| 11th cousin 17 times removed | XLI | 29 |
| 11th cousin 18 times removed | XLII | 30 |
| 11th cousin 19 times removed | XLIII | 31 |
| 11th cousin 20 times removed | XLIV | 32 |
| 11th cousin 21 times removed | XLV | 33 |
| Arbuthnot, Duncan | 22nd great-grandfather | XXIV | 24 |
| Arbuthnot, Duncan | 21st great-grandfather | XXIII | 23 |
| Arbuthnot, Duncan Osbert | 25th great-grandfather | XXVII | 27 |
| Arbuthnot, Elizabeth Durham | 15th great-grandmother | XVII | 17 |
| 4th cousin 15 times removed | XXV | 20 |
| 4th cousin 16 times removed | XXVI | 21 |
| Half 5th cousin 15 times removed | XXVII | 21 |
| 4th cousin 17 times removed | XXVII | 22 |
| 5th cousin 16 times removed | XXVIII | 22 |
| 5th cousin 17 times removed | XXIX | 23 |
| Half 5th cousin 17 times removed | XXIX | 23 |
| 5th cousin 18 times removed | XXX | 24 |
| Half 5th cousin 18 times removed | XXX | 24 |
| 6th cousin 17 times removed | XXXI | 24 |
| Half 6th cousin 17 times removed | XXXI | 24 |
| 7th cousin 16 times removed | XXXII | 24 |
| Half 6th cousin 18 times removed | XXXII | 25 |
| 7th cousin 17 times removed | XXXIII | 25 |
| 8th cousin 15 times removed | XXXIII | 24 |
| 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 |
| 8th cousin 17 times removed | XXXV | 26 |
| 7th cousin 20 times removed | XXXVI | 28 |