| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 14th cousin 16 times removed | XLVI | 31 |
| 15th cousin 15 times removed | XLVII | 31 |
| 16th cousin 13 times removed | XLVII | 30 |
| 14th cousin 17 times removed | XLVII | 32 |
| 15th cousin 16 times removed | XLVIII | 32 |
| 16th cousin 14 times removed | XLVIII | 31 |
| 14th cousin 18 times removed | XLVIII | 33 |
| 15th cousin 17 times removed | XLIX | 33 |
| 16th cousin 15 times removed | XLIX | 32 |
| 16th cousin 16 times removed | L | 33 |
| 15th cousin 18 times removed | L | 34 |
| 16th cousin 17 times removed | LI | 34 |
| Johnston, James Meldrum | 14th great-grandfather | XVI | 16 |
| 2nd cousin 16 times removed | XXII | 19 |
| 4th cousin 18 times removed | XXVIII | 23 |
| Half 4th cousin 19 times removed | XXIX | 24 |
| Half 5th cousin 17 times removed | XXIX | 23 |
| 7th cousin 16 times removed | XXXII | 24 |
| 6th cousin 18 times removed | XXXII | 25 |
| 6th cousin 19 times removed | XXXIII | 26 |
| 7th cousin 17 times removed | XXXIII | 25 |
| 7th cousin 18 times removed | XXXIV | 26 |
| 7th cousin 19 times removed | XXXV | 27 |
| 8th cousin 17 times removed | XXXV | 26 |
| 8th cousin 18 times removed | XXXVI | 27 |
| 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 |
| 13th cousin 16 times removed | XLIV | 30 |
| 11th cousin 21 times removed | XLV | 33 |
| 13th cousin 19 times removed | XLVII | 33 |
| Husband of the 5th cousin 14 times removed | | |
| Husband of the 5th cousin 15 times removed | | |
| Husband of the half 6th cousin 14 times removed | | |
| Husband of the 5th cousin 16 times removed | | |
| Husband of the 6th cousin 15 times removed | | |
| Husband of the 6th cousin 16 times removed | | |
| Husband of the half 6th cousin 16 times removed | | |
| Husband of the 6th cousin 17 times removed | | |
| Husband of the half 6th cousin 17 times removed | | |
| Husband of the 7th cousin 15 times removed | | |
| Husband of the 7th cousin 16 times removed | | |
| Husband of the half 7th cousin 16 times removed | | |
| Husband of the 8th cousin 15 times removed | | |
| Husband of the 7th cousin 17 times removed | | |