| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Husband of the 6th cousin 23 times removed | | |
| Husband of the 6th cousin 26 times removed | | |
| Lentran, Elizabeth | 12th great-grandmother | XIV | 14 |
| Wife of the 6th cousin 14 times removed | | |
| Wife of the 6th cousin 15 times removed | | |
| Wife of the 7th cousin 14 times removed | | |
| Wife of the half 7th cousin 15 times removed | | |
| Wife of the 8th cousin 15 times removed | | |
| Wife of the 9th cousin 15 times removed | | |
| Wife of the 9th cousin 16 times removed | | |
| Wife of the 9th cousin 17 times removed | | |
| Wife of the 11th cousin 13 times removed | | |
| Wife of the 9th cousin 18 times removed | | |
| Wife of the 10th cousin 16 times removed | | |
| Wife of the 11th cousin 14 times removed | | |
| Wife of the 9th cousin 19 times removed | | |
| Wife of the 11th cousin 15 times removed | | |
| Wife of the 10th cousin 18 times removed | | |
| Wife of the 11th cousin 16 times removed | | |
| Wife of the 14th cousin 14 times removed | | |
| Wife of the 14th cousin 15 times removed | | |
| Wife of the 14th cousin 16 times removed | | |
| Wife of the 14th cousin 17 times removed | | |
| Wife of the 14th cousin 18 times removed | | |
| Leon, Alain Coezou | 31st great-grandfather | XXXIII | 33 |
| 34th great-grandfather | XXXVI | 36 |
| Leon, Anne Cornouaille | 29th great-grandmother | XXXI | 31 |
| 32nd great-grandmother | XXXIV | 34 |
| Leon, Even | 34th great-grandfather | XXXVI | 36 |
| 37th great-grandfather | XXXIX | 39 |
| Leon, Guiomar | 30th great-grandfather | XXXII | 32 |
| 33rd great-grandfather | XXXV | 35 |
| Leon, Hamon | 33rd great-grandfather | XXXV | 35 |
| 36th great-grandfather | XXXVIII | 38 |
| Leon, Herve Cornouaille | 29th great-granduncle | XXXIII | 32 |
| 32nd great-granduncle | XXXVI | 35 |
| Leon, Morvan | 36th great-grandfather | XXXVIII | 38 |
| 39th great-grandfather | XLI | 41 |
| Leon, Morvan | 32nd great-grandfather | XXXIV | 34 |
| 35th great-grandfather | XXXVII | 37 |
| Leon, Prinis | 35th great-grandfather | XXXVII | 37 |
| 38th great-grandfather | XL | 40 |
| Leslie, Andrew | 21st great-grandfather | XXIII | 23 |
| Leslie, Andrew Abernathy | 20th great-granduncle | XXIV | 23 |
| Leslie, Andrew Maxwell | 18th great-grandfather | XX | 20 |
| Leslie, George Abernathy | 20th great-grandfather | XXII | 22 |
| Leslie, Griselda Fraser | 16th great-grandmother | XVIII | 18 |
| 5th cousin 17 times removed | XXIX | 23 |
| 5th cousin 19 times removed | XXXI | 25 |
| 6th cousin 19 times removed | XXXIII | 26 |