| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 22nd cousin 7 times removed | LIII | 30 |
| 18th cousin 15 times removed | LIII | 34 |
| 19th cousin 14 times removed | LIV | 34 |
| 20th cousin 12 times removed | LIV | 33 |
| 18th cousin 16 times removed | LIV | 35 |
| 21st cousin 10 times removed | LIV | 32 |
| 22nd cousin 8 times removed | LIV | 31 |
| 20th cousin 13 times removed | LV | 34 |
| 21st cousin 11 times removed | LV | 33 |
| 22nd cousin 9 times removed | LV | 32 |
| 21st cousin 12 times removed | LVI | 34 |
| 22nd cousin 10 times removed | LVI | 33 |
| Johnston, William Barclay | 13th great-grandfather | XV | 15 |
| 3rd cousin 15 times removed | XXIII | 19 |
| 6th cousin 13 times removed | XXVII | 20 |
| 6th cousin 14 times removed | XXVIII | 21 |
| Half 7th cousin 13 times removed | XXIX | 21 |
| 6th cousin 15 times removed | XXIX | 22 |
| 5th cousin 17 times removed | XXIX | 23 |
| 7th cousin 14 times removed | XXX | 22 |
| Half 5th cousin 18 times removed | XXX | 24 |
| Half 6th cousin 16 times removed | XXX | 23 |
| 7th cousin 15 times removed | XXXI | 23 |
| Half 7th cousin 15 times removed | XXXI | 23 |
| 7th cousin 16 times removed | XXXII | 24 |
| Half 7th cousin 16 times removed | XXXII | 24 |
| 8th cousin 14 times removed | XXXII | 23 |
| 8th cousin 15 times removed | XXXIII | 24 |
| Half 8th cousin 15 times removed | XXXIII | 24 |
| 7th cousin 17 times removed | XXXIII | 25 |
| 9th cousin 14 times removed | XXXIV | 24 |
| 8th cousin 16 times removed | XXXIV | 25 |
| Half 8th cousin 16 times removed | XXXIV | 25 |
| 7th cousin 18 times removed | XXXIV | 26 |
| 9th cousin 15 times removed | XXXV | 25 |
| 8th cousin 17 times removed | XXXV | 26 |
| 10th cousin 13 times removed | XXXV | 24 |
| 9th cousin 16 times removed | XXXVI | 26 |
| 8th cousin 18 times removed | XXXVI | 27 |
| 10th cousin 14 times removed | XXXVI | 25 |
| 9th cousin 17 times removed | XXXVII | 27 |
| 11th cousin 13 times removed | XXXVII | 25 |
| 10th cousin 15 times removed | XXXVII | 26 |
| 9th cousin 18 times removed | XXXVIII | 28 |
| 10th cousin 16 times removed | XXXVIII | 27 |
| 11th cousin 14 times removed | XXXVIII | 26 |
| 8th cousin 20 times removed | XXXVIII | 29 |
| 9th cousin 19 times removed | XXXIX | 29 |
| 8th cousin 21 times removed | XXXIX | 30 |
| 11th cousin 15 times removed | XXXIX | 27 |