| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 8th cousin 21 times removed | XXXIX | 30 |
| 7th cousin 23 times removed | XXXIX | 31 |
| 8th cousin 22 times removed | XL | 31 |
| 10th cousin 18 times removed | XL | 29 |
| 11th cousin 16 times removed | XL | 28 |
| 10th cousin 19 times removed | XLI | 30 |
| 11th cousin 17 times removed | XLI | 29 |
| 12th cousin 16 times removed | XLII | 29 |
| 10th cousin 20 times removed | XLII | 31 |
| 11th cousin 18 times removed | XLII | 30 |
| 12th cousin 17 times removed | XLIII | 30 |
| 10th cousin 21 times removed | XLIII | 32 |
| 11th cousin 19 times removed | XLIII | 31 |
| 12th cousin 18 times removed | XLIV | 31 |
| 10th cousin 22 times removed | XLIV | 33 |
| 11th cousin 20 times removed | XLIV | 32 |
| 12th cousin 19 times removed | XLV | 32 |
| 11th cousin 21 times removed | XLV | 33 |
| 12th cousin 20 times removed | XLVI | 33 |
| 11th cousin 22 times removed | XLVI | 34 |
| Forbes, William Keith | 15th great-grandfather | XVII | 17 |
| 1st cousin 17 times removed | XXI | 19 |
| Half 3rd cousin 19 times removed | XXVII | 23 |
| 4th cousin 17 times removed | XXVII | 22 |
| 3rd cousin 19 times removed | XXVII | 23 |
| 3rd cousin 20 times removed | XXVIII | 24 |
| Half 3rd cousin 20 times removed | XXVIII | 24 |
| Half 4th cousin 18 times removed | XXVIII | 23 |
| 3rd cousin 21 times removed | XXIX | 25 |
| 6th cousin 17 times removed | XXXI | 24 |
| 5th cousin 19 times removed | XXXI | 25 |
| 6th cousin 18 times removed | XXXII | 25 |
| 7th cousin 16 times removed | XXXII | 24 |
| 5th cousin 20 times removed | XXXII | 26 |
| 7th cousin 17 times removed | XXXIII | 25 |
| 6th cousin 19 times removed | XXXIII | 26 |
| 6th cousin 20 times removed | XXXIV | 27 |
| 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 |
| 9th cousin 16 times removed | XXXVI | 26 |
| 7th cousin 20 times removed | XXXVI | 28 |
| 9th cousin 17 times removed | XXXVII | 27 |
| 7th cousin 21 times removed | XXXVII | 29 |
| 8th cousin 20 times removed | XXXVIII | 29 |
| 9th cousin 18 times removed | XXXVIII | 28 |
| 7th cousin 22 times removed | XXXVIII | 30 |
| 8th cousin 21 times removed | XXXIX | 30 |
| 7th cousin 23 times removed | XXXIX | 31 |