| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Cranston, William | 14th great-grandfather | XVI | 16 |
| Crawford, Alyse | 22nd great-grandmother | XXIV | 24 |
| Wife of the 4th cousin 21 times removed | | |
| Wife of the 4th cousin 22 times removed | | |
| Wife of the 4th cousin 23 times removed | | |
| Wife of the 4th cousin 24 times removed | | |
| Wife of the 4th cousin 25 times removed | | |
| Wife of the 7th cousin 20 times removed | | |
| Wife of the 7th cousin 21 times removed | | |
| Wife of the 7th cousin 22 times removed | | |
| Wife of the 7th cousin 23 times removed | | |
| Wife of the 6th cousin 25 times removed | | |
| Wife of the 7th cousin 24 times removed | | |
| Wife of the 7th cousin 25 times removed | | |
| Wife of the 7th cousin 26 times removed | | |
| Crawford, Andrew | 23rd great-grandfather | XXV | 25 |
| Crawford, Susanna | 26th great-grandmother | XXVIII | 28 |
| Creil, Huge | 36th great-grandfather | XXXVIII | 38 |
| 37th great-grandfather | XXXIX | 39 |
| Creil, Hugh | 34th great-grandfather | XXXVI | 36 |
| 35th great-grandfather | XXXVII | 37 |
| Creil, Renaud | 35th great-grandfather | XXXVII | 37 |
| 36th great-grandfather | XXXVIII | 38 |
| Creil, Yves | 34th great-granduncle | XXXVIII | 37 |
| 35th great-granduncle | XXXIX | 38 |
| Crepon, Aueline | 34th great-grandmother | XXXVI | 36 |
| 35th great-grandmother | XXXVII | 37 |
| Crepon, Wevia Ivry | 35th great-grandmother | XXXVII | 37 |
| 36th great-grandmother | XXXVIII | 38 |
| Crichton, Agnes | 16th great-grandaunt | XX | 19 |
| 17th great-grandaunt | XXI | 20 |
| Crichton, Elizabeth | 16th great-grandmother | XVIII | 18 |
| 17th great-grandmother | XIX | 19 |
| Wife of the 2nd cousin 18 times removed | | |
| Wife of the 2nd cousin 19 times removed | | |
| Wife of the 3rd cousin 18 times removed | | |
| Wife of the half 3rd cousin 19 times removed | | |
| Wife of the 4th cousin 19 times removed | | |
| Wife of the 5th cousin 19 times removed | | |
| Wife of the 5th cousin 20 times removed | | |
| Wife of the 5th cousin 21 times removed | | |
| Wife of the 7th cousin 17 times removed | | |
| Wife of the 5th cousin 22 times removed | | |
| Wife of the 6th cousin 20 times removed | | |
| Wife of the 7th cousin 18 times removed | | |
| Wife of the 5th cousin 23 times removed | | |
| Wife of the 7th cousin 19 times removed | | |
| Wife of the 6th cousin 22 times removed | | |
| Wife of the 7th cousin 20 times removed | | |
| Wife of the 9th cousin 17 times removed | | |