| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Clare, Aveline | 29th great-grandaunt | XXXIII | 32 |
| Half 1st cousin 29 times removed | XXXIII | 31 |
| 2nd cousin 28 times removed | XXXIV | 31 |
| 2nd cousin 30 times removed | XXXVI | 33 |
| 2nd cousin 31 times removed | XXXVII | 34 |
| Clare, Avice Fitzrichard Gifford | 31st great-grandaunt | XXXV | 34 |
| 32nd great-grandaunt | XXXVI | 35 |
| Clare, Baldwin Of Bourne Fitz Gilbert Clermont | 30th great-grandfather | XXXII | 32 |
| 31st great-granduncle | XXXV | 34 |
| Clare, Elana | 29th great-grandaunt | XXXIII | 32 |
| Half 1st cousin 29 times removed | XXXIII | 31 |
| 2nd cousin 28 times removed | XXXIV | 31 |
| 2nd cousin 30 times removed | XXXVI | 33 |
| 2nd cousin 31 times removed | XXXVII | 34 |
| Clare, Eleanor | 28th great-grandmother | XXX | 30 |
| 2nd cousin 31 times removed | XXXVII | 34 |
| Clare, Elizabeth Fitzrichard Gifford | 31st great-grandaunt | XXXV | 34 |
| 32nd great-grandaunt | XXXVI | 35 |
| Clare, Emma Fitz Baldwin | 29th great-grandaunt | XXXIII | 32 |
| 1st cousin 32 times removed | XXXVI | 34 |
| Clare, Gilbert Fitzrichard Gifford | 31st great-grandfather | XXXIII | 33 |
| 32nd great-grandfather | XXXIV | 34 |
| Clare, Gilbert Fitzwilliam | 28th great-granduncle | XXXII | 31 |
| Half 2nd cousin 28 times removed | XXXIV | 31 |
| 3rd cousin 27 times removed | XXXV | 31 |
| 3rd cousin 29 times removed | XXXVII | 33 |
| 3rd cousin 30 times removed | XXXVIII | 34 |
| Clare, Gilbert Meschin | Half 28th great-granduncle | XXXII | 31 |
| 1st cousin 29 times removed | XXXIII | 31 |
| 30th great-granduncle | XXXIV | 33 |
| 1st cousin 31 times removed | XXXV | 33 |
| 1st cousin 32 times removed | XXXVI | 34 |
| Clare, Hawise Fitzgilbert Clermont | 30th great-grandaunt | XXXIV | 33 |
| 31st great-grandaunt | XXXV | 34 |
| Clare, James | 29th great-granduncle | XXXIII | 32 |
| Half 1st cousin 29 times removed | XXXIII | 31 |
| 2nd cousin 28 times removed | XXXIV | 31 |
| 2nd cousin 30 times removed | XXXVI | 33 |
| 2nd cousin 31 times removed | XXXVII | 34 |
| Clare, Joan Fitzwilliam | 28th great-grandaunt | XXXII | 31 |
| Half 2nd cousin 28 times removed | XXXIV | 31 |
| 3rd cousin 27 times removed | XXXV | 31 |
| 3rd cousin 29 times removed | XXXVII | 33 |
| 3rd cousin 30 times removed | XXXVIII | 34 |
| Clare, John Fitzgilbert Clermont | 30th great-granduncle | XXXIV | 33 |
| 31st great-granduncle | XXXV | 34 |
| Clare, Margaret Fitzgilbert Clermont | 30th great-grandaunt | XXXIV | 33 |
| 31st great-grandaunt | XXXV | 34 |
| Clare, Maud Or Matilda Fitzwilliam | 28th great-grandmother | XXX | 30 |
| Half 2nd cousin 28 times removed | XXXIV | 31 |