| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 3rd cousin 24 times removed | XXXII | 28 |
| 5th cousin 23 times removed | XXXV | 29 |
| 5th cousin 24 times removed | XXXVI | 30 |
| 5th cousin 25 times removed | XXXVII | 31 |
| 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 |
| 8th cousin 23 times removed | XLI | 32 |
| 8th cousin 24 times removed | XLII | 33 |
| 8th cousin 25 times removed | XLIII | 34 |
| Wemyss, David | 18th great-grandfather | XX | 20 |
| 4th cousin 19 times removed | XXIX | 24 |
| 3rd cousin 22 times removed | XXX | 26 |
| 4th cousin 21 times removed | XXXI | 26 |
| 4th cousin 22 times removed | XXXII | 27 |
| 6th cousin 18 times removed | XXXII | 25 |
| 4th cousin 23 times removed | XXXIII | 28 |
| 6th cousin 22 times removed | XXXVI | 29 |
| 6th cousin 23 times removed | XXXVII | 30 |
| 6th cousin 24 times removed | XXXVIII | 31 |
| 9th cousin 18 times removed | XXXVIII | 28 |
| 9th cousin 19 times removed | XXXIX | 29 |
| 9th cousin 20 times removed | XL | 30 |
| 9th cousin 21 times removed | XLI | 31 |
| 9th cousin 22 times removed | XLII | 32 |
| 9th cousin 23 times removed | XLIII | 33 |
| 9th cousin 24 times removed | XLIV | 34 |
| Wemyss, David II | 20th great-grandfather | XXII | 22 |
| 1st cousin 21 times removed | XXV | 23 |
| 1st cousin 23 times removed | XXVII | 25 |
| Wemyss, Duncan Erskine | 16th great-granduncle | XX | 19 |
| 1st cousin 20 times removed | XXIV | 22 |
| 2nd cousin 21 times removed | XXVII | 24 |
| 4th cousin 19 times removed | XXIX | 24 |
| 6th cousin 17 times removed | XXXI | 24 |
| 5th cousin 20 times removed | XXXII | 26 |
| 6th cousin 19 times removed | XXXIII | 26 |
| 6th cousin 20 times removed | XXXIV | 27 |
| 8th cousin 16 times removed | XXXIV | 25 |
| 6th cousin 21 times removed | XXXV | 28 |
| 8th cousin 20 times removed | XXXVIII | 29 |
| 8th cousin 21 times removed | XXXIX | 30 |
| 8th cousin 22 times removed | XL | 31 |
| 11th cousin 16 times removed | XL | 28 |
| 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 |