| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 9th cousin 17 times removed | XXXVII | 27 |
| 11th cousin 13 times removed | XXXVII | 25 |
| 10th cousin 16 times removed | XXXVIII | 27 |
| 9th cousin 18 times removed | XXXVIII | 28 |
| 12th cousin 12 times removed | XXXVIII | 25 |
| 11th cousin 14 times removed | XXXVIII | 26 |
| 10th cousin 17 times removed | XXXIX | 28 |
| 9th cousin 19 times removed | XXXIX | 29 |
| 11th cousin 15 times removed | XXXIX | 27 |
| 12th cousin 13 times removed | XXXIX | 26 |
| 10th cousin 18 times removed | XL | 29 |
| 11th cousin 16 times removed | XL | 28 |
| 12th cousin 14 times removed | XL | 27 |
| 13th cousin 13 times removed | XLI | 27 |
| 12th cousin 15 times removed | XLI | 28 |
| 11th cousin 17 times removed | XLI | 29 |
| 10th cousin 19 times removed | XLI | 30 |
| 13th cousin 14 times removed | XLII | 28 |
| 12th cousin 16 times removed | XLII | 29 |
| 11th cousin 18 times removed | XLII | 30 |
| 10th cousin 20 times removed | XLII | 31 |
| 12th cousin 17 times removed | XLIII | 30 |
| 11th cousin 19 times removed | XLIII | 31 |
| 13th cousin 15 times removed | XLIII | 29 |
| 14th cousin 13 times removed | XLIII | 28 |
| 12th cousin 18 times removed | XLIV | 31 |
| 14th cousin 14 times removed | XLIV | 29 |
| 13th cousin 16 times removed | XLIV | 30 |
| 15th cousin 12 times removed | XLIV | 28 |
| 14th cousin 15 times removed | XLV | 30 |
| 15th cousin 13 times removed | XLV | 29 |
| 13th cousin 17 times removed | XLV | 31 |
| 14th cousin 16 times removed | XLVI | 31 |
| 15th cousin 14 times removed | XLVI | 30 |
| 13th cousin 18 times removed | XLVI | 32 |
| 14th cousin 17 times removed | XLVII | 32 |
| 15th cousin 15 times removed | XLVII | 31 |
| 13th cousin 19 times removed | XLVII | 33 |
| 14th cousin 18 times removed | XLVIII | 33 |
| 15th cousin 16 times removed | XLVIII | 32 |
| 15th cousin 17 times removed | XLIX | 33 |
| 14th cousin 19 times removed | XLIX | 34 |
| 15th cousin 18 times removed | L | 34 |
| Forbes, Malcolm Kennedy | 17th great-granduncle | XXI | 20 |
| 4th cousin 20 times removed | XXX | 25 |
| 4th cousin 21 times removed | XXXI | 26 |
| 10th cousin 19 times removed | XLI | 30 |
| 10th cousin 22 times removed | XLIV | 33 |
| Forbes, Margaret Douglas | 16th great-grandmother | XVIII | 18 |
| 16th great-grandaunt | XX | 19 |