| Name | Relationship with Natalie Seiwell | Civil | Canon |
| Wife of the half 1st cousin 29 times removed | | |
| Wife of the 2nd cousin 28 times removed | | |
| Wife of the 2nd cousin 30 times removed | | |
| Wife of the 2nd cousin 31 times removed | | |
| Fitzwilliam, Isabel Beaumont | 29th great-grandaunt | XXXIII | 32 |
| Fitzwilliam, Joanne | 16th great-grandmother | XVIII | 18 |
| Fitzwilliam, Mabel Beaumont | 29th great-grandaunt | XXXIII | 32 |
| Fitzwilliams, Edward | 17th great-grandfather | XIX | 19 |
| Flaad, Water | 29th great-grandfather | XXXI | 31 |
| 30th great-grandfather | XXXII | 32 |
| 31st great-grandfather | XXXIII | 33 |
| 32nd great-grandfather | XXXIV | 34 |
| Flava, Grizzle | 26th great-grandmother | XXVIII | 28 |
| 27th great-grandmother | XXIX | 29 |
| Wife of the 21st great-granduncle | | |
| Wife of the 1st cousin 24 times removed | | |
| Wife of the 1st cousin 25 times removed | | |
| Wife of the 1st cousin 26 times removed | | |
| Wife of the 1st cousin 27 times removed | | |
| Wife of the 1st cousin 28 times removed | | |
| Fleitel, Agnes Ermentrude | 33rd great-grandmother | XXXV | 35 |
| 34th great-grandmother | XXXVI | 36 |
| Fleitel, Basiline | 33rd great-grandaunt | XXXVII | 36 |
| 34th great-grandaunt | XXXVIII | 37 |
| Fleitel, Girard Rouen | 34th great-grandfather | XXXVI | 36 |
| 35th great-grandfather | XXXVII | 37 |
| Fleming, Baldwin | 28th great-grandfather | XXX | 30 |
| Fleming, Brigid | 21st great-grandaunt | XXV | 24 |
| 2nd cousin 24 times removed | XXX | 27 |
| 5th cousin 18 times removed | XXX | 24 |
| 6th cousin 19 times removed | XXXIII | 26 |
| 6th cousin 20 times removed | XXXIV | 27 |
| 6th cousin 21 times removed | XXXV | 28 |
| 6th cousin 22 times removed | XXXVI | 29 |
| 6th cousin 23 times removed | XXXVII | 30 |
| Fleming, David | 20th great-granduncle | XXIV | 23 |
| 3rd cousin 23 times removed | XXXI | 27 |
| 6th cousin 17 times removed | XXXI | 24 |
| 7th cousin 18 times removed | XXXIV | 26 |
| 7th cousin 19 times removed | XXXV | 27 |
| 7th cousin 20 times removed | XXXVI | 28 |
| 7th cousin 21 times removed | XXXVII | 29 |
| 7th cousin 22 times removed | XXXVIII | 30 |
| Fleming, David | 21st great-grandfather | XXIII | 23 |
| 2nd cousin 24 times removed | XXX | 27 |
| 5th cousin 18 times removed | XXX | 24 |
| 6th cousin 19 times removed | XXXIII | 26 |
| 6th cousin 20 times removed | XXXIV | 27 |
| 6th cousin 21 times removed | XXXV | 28 |
| 6th cousin 22 times removed | XXXVI | 29 |