| Name | Relationship with Natalie Seiwell | Civil | Canon |
| 3rd cousin 30 times removed | XXXVIII | 34 |
| 4th cousin 28 times removed | XXXVIII | 33 |
| 2nd cousin 32 times removed | XXXVIII | 35 |
| Zouche, Roger Quincy | 23rd great-grandfather | XXV | 25 |
| 26th great-grandfather | XXVIII | 28 |
| 6th cousin 23 times removed | XXXVII | 30 |
| 4th cousin 27 times removed | XXXVII | 32 |
| 5th cousin 26 times removed | XXXVIII | 32 |
| 5th cousin 28 times removed | XL | 34 |
| 6th cousin 26 times removed | XL | 33 |
| 4th cousin 30 times removed | XL | 35 |