| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 20th cousin 7 times removed | XLIX | 28 |
| 18th cousin 12 times removed | L | 31 |
| 17th cousin 14 times removed | L | 32 |
| 20th cousin 8 times removed | L | 29 |
| 19th cousin 10 times removed | L | 30 |
| 16th cousin 16 times removed | L | 33 |
| 21st cousin 6 times removed | L | 28 |
| 20th cousin 9 times removed | LI | 30 |
| 18th cousin 13 times removed | LI | 32 |
| 17th cousin 15 times removed | LI | 33 |
| 19th cousin 11 times removed | LI | 31 |
| 21st cousin 7 times removed | LI | 29 |
| 20th cousin 10 times removed | LII | 31 |
| 19th cousin 12 times removed | LII | 32 |
| 18th cousin 14 times removed | LII | 33 |
| 21st cousin 8 times removed | LII | 30 |
| 22nd cousin 6 times removed | LII | 29 |
| 17th cousin 16 times removed | LII | 34 |
| Half 19th cousin 13 times removed | LIII | 33 |
| 20th cousin 11 times removed | LIII | 32 |
| 19th cousin 13 times removed | LIII | 33 |
| 21st cousin 9 times removed | LIII | 31 |
| 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, Thomas Forbes | 11th great-granduncle | XV | 14 |
| 4th cousin 14 times removed | XXIV | 19 |
| 5th cousin 13 times removed | XXV | 19 |
| 6th cousin 15 times removed | XXIX | 22 |
| 8th cousin 11 times removed | XXIX | 20 |
| 7th cousin 13 times removed | XXIX | 21 |
| 6th cousin 16 times removed | XXX | 23 |
| 7th cousin 14 times removed | XXX | 22 |
| 8th cousin 12 times removed | XXX | 21 |
| Half 7th cousin 15 times removed | XXXI | 23 |
| 8th cousin 13 times removed | XXXI | 22 |
| Half 9th cousin 11 times removed | XXXI | 21 |
| 7th cousin 15 times removed | XXXI | 23 |
| 7th cousin 16 times removed | XXXII | 24 |
| 9th cousin 12 times removed | XXXII | 22 |
| Half 8th cousin 14 times removed | XXXII | 23 |