| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Chesney, Adelaide | 30th great-grandmother | XXXII | 32 |
| Chesney, William Of Cavenby Waterville | 31st great-grandfather | XXXIII | 33 |
| Chester, Lucy | 29th great-grandmother | XXXI | 31 |
| 30th great-grandmother | XXXII | 32 |
| 32nd great-grandmother | XXXIV | 34 |
| Chester, Thorold | 30th great-grandfather | XXXII | 32 |
| 31st great-grandfather | XXXIII | 33 |
| 33rd great-grandfather | XXXV | 35 |
| Chetham, Alice | 27th great-grandmother | XXIX | 29 |
| Chetwynd, Agnes | 26th great-grandmother | XXVIII | 28 |
| Chetwynd, Richard | 28th great-grandfather | XXX | 30 |
| Chetwynd, William | 27th great-grandfather | XXIX | 29 |
| Cheyne, Mariota | 19th great-grandmother | XXI | 21 |
| Wife of the 19th great-granduncle | | |
| Wife of the 20th great-granduncle | | |
| Wife of the half 20th great-granduncle | | |
| Wife of the 3rd cousin 23 times removed | | |
| Wife of the 3rd cousin 25 times removed | | |
| Cheyne, Reginald | 22nd great-grandfather | XXIV | 24 |
| Cheyne, Reginald Duffus | 21st great-grandfather | XXIII | 23 |
| Cheyne, Reginald Of Inverugie | 20th great-grandfather | XXII | 22 |
| Child, Wayne Everett | Husband of the 7th cousin once removed | | |
| Chirnside, Beatrix | 13th great-grandmother | XV | 15 |
| Christian | 22nd great-grandmother | XXIV | 24 |
| Wife of the 1st cousin 25 times removed | | |
| Wife of the 4th cousin 19 times removed | | |
| Wife of the 5th cousin 20 times removed | | |
| Wife of the 5th cousin 21 times removed | | |
| Wife of the 5th cousin 22 times removed | | |
| Wife of the 5th cousin 23 times removed | | |
| Wife of the 5th cousin 24 times removed | | |
| Christian | 21st great-grandmother | XXIII | 23 |
| Christian Of Strathern | 25th great-grandmother | XXVII | 27 |
| Christien, Catherine | Wife of the 2nd cousin 6 times removed | | |
| Christina | 22nd great-grandmother | XXIV | 24 |
| Clare, Adeliza Fitzrichard Gifford | 31st great-grandaunt | XXXV | 34 |
| 32nd great-grandaunt | XXXVI | 35 |
| Clare, Adles Meschin | Half 28th great-grandaunt | XXXII | 31 |
| 1st cousin 29 times removed | XXXIII | 31 |
| 30th great-grandaunt | XXXIV | 33 |
| 1st cousin 31 times removed | XXXV | 33 |
| 1st cousin 32 times removed | XXXVI | 34 |
| Clare, Agatha Fay | 27th great-grandmother | XXIX | 29 |
| Clare, Agnes Fitzgilbert Clermont | 30th great-grandaunt | XXXIV | 33 |
| 31st great-grandaunt | XXXV | 34 |
| Clare, Alice Or Adeliza Meschin | Half 28th great-grandaunt | XXXII | 31 |
| 1st cousin 29 times removed | XXXIII | 31 |
| 30th great-grandaunt | XXXIV | 33 |
| 1st cousin 31 times removed | XXXV | 33 |
| 1st cousin 32 times removed | XXXVI | 34 |