| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Husband of the 3rd cousin 22 times removed | | |
| Husband of the 3rd cousin 23 times removed | | |
| Husband of the 3rd cousin 24 times removed | | |
| Husband of the 3rd cousin 25 times removed | | |
| Stewart, Robert III Mure | 18th great-grandfather | XX | 20 |
| 21st great-grandfather | XXIII | 23 |
| 20th great-granduncle | XXIV | 23 |
| Half 20th great-granduncle | XXIV | 23 |
| 21st great-granduncle | XXV | 24 |
| Half 1st cousin 22 times removed | XXVI | 24 |
| Half 1st cousin 23 times removed | XXVII | 25 |
| 3rd cousin 20 times removed | XXVIII | 24 |
| 3rd cousin 21 times removed | XXIX | 25 |
| 4th cousin 20 times removed | XXX | 25 |
| 3rd cousin 22 times removed | XXX | 26 |
| 3rd cousin 23 times removed | XXXI | 27 |
| 4th cousin 21 times removed | XXXI | 26 |
| 4th cousin 22 times removed | XXXII | 27 |
| 4th cousin 23 times removed | XXXIII | 28 |
| 4th cousin 24 times removed | XXXIV | 29 |
| 4th cousin 25 times removed | XXXV | 30 |
| 4th cousin 26 times removed | XXXVI | 31 |
| 7th cousin 21 times removed | XXXVII | 29 |
| 7th cousin 22 times removed | XXXVIII | 30 |
| 7th cousin 23 times removed | XXXIX | 31 |
| 7th cousin 24 times removed | XL | 32 |
| 7th cousin 25 times removed | XLI | 33 |
| Stewart, Robert Of Aubigny Montgomery | 15th great-granduncle | XIX | 18 |
| 5th cousin 15 times removed | XXVII | 21 |
| Half 5th cousin 15 times removed | XXVII | 21 |
| 4th cousin 17 times removed | XXVII | 22 |
| 4th cousin 18 times removed | XXVIII | 23 |
| 5th cousin 16 times removed | XXVIII | 22 |
| 6th cousin 14 times removed | XXVIII | 21 |
| 7th cousin 13 times removed | XXIX | 21 |
| 6th cousin 15 times removed | XXIX | 22 |
| 4th cousin 19 times removed | XXIX | 24 |
| Half 5th cousin 17 times removed | XXIX | 23 |
| Half 6th cousin 15 times removed | XXIX | 22 |
| 5th cousin 18 times removed | XXX | 24 |
| Half 6th cousin 16 times removed | XXX | 23 |
| 7th cousin 14 times removed | XXX | 22 |
| Half 5th cousin 18 times removed | XXX | 24 |
| 4th cousin 20 times removed | XXX | 25 |
| Half 7th cousin 14 times removed | XXX | 22 |
| Half 7th cousin 15 times removed | XXXI | 23 |
| 8th cousin 13 times removed | XXXI | 22 |
| Half 5th cousin 19 times removed | XXXI | 25 |
| 4th cousin 21 times removed | XXXI | 26 |
| 6th cousin 17 times removed | XXXI | 24 |