| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 19th cousin 11 times removed | LI | 31 |
| 20th cousin 9 times removed | LI | 30 |
| 21st cousin 7 times removed | LI | 29 |
| 18th cousin 13 times removed | LI | 32 |
| 22nd cousin 5 times removed | LI | 28 |
| 20th cousin 10 times removed | LII | 31 |
| 19th cousin 12 times removed | LII | 32 |
| 22nd cousin 6 times removed | LII | 29 |
| 21st cousin 8 times removed | LII | 30 |
| 18th cousin 14 times removed | LII | 33 |
| 23rd cousin 4 times removed | LII | 28 |
| 22nd cousin 7 times removed | LIII | 30 |
| 20th cousin 11 times removed | LIII | 32 |
| 19th cousin 13 times removed | LIII | 33 |
| 21st cousin 9 times removed | LIII | 31 |
| 23rd cousin 5 times removed | LIII | 29 |
| 22nd cousin 8 times removed | LIV | 31 |
| 21st cousin 10 times removed | LIV | 32 |
| 20th cousin 12 times removed | LIV | 33 |
| 23rd cousin 6 times removed | LIV | 30 |
| 24th cousin 4 times removed | LIV | 29 |
| 19th cousin 14 times removed | LIV | 34 |
| Half 21st cousin 11 times removed | LV | 33 |
| 22nd cousin 9 times removed | LV | 32 |
| 21st cousin 11 times removed | LV | 33 |
| 23rd cousin 7 times removed | LV | 31 |
| 24th cousin 5 times removed | LV | 30 |
| 20th cousin 13 times removed | LV | 34 |
| 21st cousin 12 times removed | LVI | 34 |
| 22nd cousin 10 times removed | LVI | 33 |
| 20th cousin 14 times removed | LVI | 35 |
| 23rd cousin 8 times removed | LVI | 32 |
| 24th cousin 6 times removed | LVI | 31 |
| 22nd cousin 11 times removed | LVII | 34 |
| 23rd cousin 9 times removed | LVII | 33 |
| 24th cousin 7 times removed | LVII | 32 |
| 23rd cousin 10 times removed | LVIII | 34 |
| 24th cousin 8 times removed | LVIII | 33 |
| Johnston, Adam | 20th great-grandfather | XXII | 22 |
| Johnston, Agnes Barclay | 13th great-grandaunt | XVII | 16 |
| 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 |