| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 9th cousin 20 times removed | XL | 30 |
| 7th cousin 24 times removed | XL | 32 |
| 8th cousin 23 times removed | XLI | 32 |
| 8th cousin 25 times removed | XLIII | 34 |
| 9th cousin 23 times removed | XLIII | 33 |
| 7th cousin 27 times removed | XLIII | 35 |
| Holland, Robert | 21st great-grandfather | XXIII | 23 |
| 24th great-grandfather | XXVI | 26 |
| Husband of the 8th cousin 21 times removed | | |
| Husband of the 6th cousin 25 times removed | | |
| Husband of the 7th cousin 24 times removed | | |
| Husband of the 7th cousin 26 times removed | | |
| Husband of the 8th cousin 24 times removed | | |
| Husband of the 6th cousin 28 times removed | | |
| Holland, Robert Zouche | 20th great-granduncle | XXIV | 23 |
| 23rd great-granduncle | XXVII | 26 |
| 9th cousin 20 times removed | XL | 30 |
| 7th cousin 24 times removed | XL | 32 |
| 8th cousin 23 times removed | XLI | 32 |
| 8th cousin 25 times removed | XLIII | 34 |
| 9th cousin 23 times removed | XLIII | 33 |
| 7th cousin 27 times removed | XLIII | 35 |
| Holland, Thomas Plantagenet | 19th great-grandfather | XXI | 21 |
| 22nd great-grandfather | XXIV | 24 |
| Half 2nd cousin 21 times removed | XXVII | 24 |
| Half 3rd cousin 21 times removed | XXIX | 25 |
| 3rd cousin 21 times removed | XXIX | 25 |
| Half 2nd cousin 24 times removed | XXX | 27 |
| Half 3rd cousin 24 times removed | XXXII | 28 |
| 5th cousin 20 times removed | XXXII | 26 |
| 3rd cousin 24 times removed | XXXII | 28 |
| 4th cousin 22 times removed | XXXII | 27 |
| 5th cousin 23 times removed | XXXV | 29 |
| 4th cousin 25 times removed | XXXV | 30 |
| 10th cousin 19 times removed | XLI | 30 |
| 8th cousin 23 times removed | XLI | 32 |
| 9th cousin 22 times removed | XLII | 32 |
| 9th cousin 24 times removed | XLIV | 34 |
| 10th cousin 22 times removed | XLIV | 33 |
| 8th cousin 26 times removed | XLIV | 35 |
| Husband of the 3rd cousin 21 times removed | | |
| Husband of the 4th cousin 22 times removed | | |
| Husband of the 3rd cousin 24 times removed | | |
| Husband of the 4th cousin 25 times removed | | |
| Husband of the 8th cousin 21 times removed | | |
| Husband of the 8th cousin 22 times removed | | |
| Husband of the 8th cousin 23 times removed | | |
| Holland, Thomas Zouche | 20th great-grandfather | XXII | 22 |
| 23rd great-grandfather | XXV | 25 |
| 9th cousin 20 times removed | XL | 30 |