| Name | Birth date | Relationship with Floyd Williams |
|---|
| Eugene, IV | WFT Est. 671-689 | 43rd great-grandfather |
| Eugene, V | WFT Est. 669-698 | 41st great-grandfather |
| Exile, The | WFT Est. 999-1017 | 30th great-grandfather |
| | | Half 30th great-granduncle |
| | | 5th cousin 31 times removed |
| | | 6th cousin 32 times removed |
| Eystein | WFT Est. 657-686 | 41st great-grandfather |
| Eystein Adilsson | Abt. 594 | 45th great-grandfather |
| Fail, Nuadha Fionn | WFT Est. Bef. 100 | 86th great-grandfather |
| | | 90th great-grandfather |
| Farabert | WFT Est. Bef. 102 | 58th great-grandfather |
| Fausta | WFT Est. 261-280 | 52nd great-grandmother |
| Fausta | WFT Est. 285-321 | 51st great-grandmother |
| Feidhlioch, Eochaidh, 93Rd King Ire | WFT Est. Bef. 100 | 68th great-grandfather |
| | | 7th cousin 66 times removed |
| Ferdinand X Of Castile | WFT Est. 1179-1219 | 24th great-grandfather |
| Fergus, I | WFT Est. Bef. 100 | 70th great-grandfather |
| | | 1st cousin 76 times removed |
| Fergusa | Abt. 750 | 39th great-grandmother |
| Ferguson, Sarah | Private | Wife of the 23rd cousin once removed |
| Fiacha | WFT Est. Bef. 100 | 71st great-grandfather |
| | | 75th great-granduncle |
| Fichafh | WFT Est. Bef. 100 | 94th great-grandfather |
| Fincormach | WFT Est. 263-338 | 55th great-grandfather |
| | | 16th cousin 61 times removed |
| Findan | WFT Est. 634-693 | 42nd great-grandfather |
| Findochar | WFT Est. 191-278 | 57th great-grandfather |
| | | 14th cousin 63 times removed |
| Fineamhnas, Bias | WFT Est. Bef. 100 | 67th great-grandfather |
| | | 8th cousin 65 times removed |
| Finligh, Prince Of Ireland | WFT Est. Bef. 100 | 70th great-grandfather |
| | | 5th cousin 68 times removed |
| Fionfachtnacht, Fioraidhack | WFT Est. Bef. 100 | 64th great-grandfather |
| | | 11th cousin 62 times removed |
| Fionn | WFT Est. 634-693 | 42nd great-grandfather |
| First Earl Of Buckingham | WFT Est. 971-1048 | 28th great-grandfather |
| Fitzalan, Philippa | WFT Est. 1328-1357 | 19th great-grandmother |
| | | Half 11th cousin 21 times removed |
| | | 14th cousin 21 times removed |
| | | 15th cousin 22 times removed |
| | | 16th cousin 20 times removed |
| | | 17th cousin 20 times removed |
| | | 16th cousin 22 times removed |
| | | 17th cousin 21 times removed |
| Fitzalan, Richard | 1307 | 20th great-grandfather |
| | | Husband of the half 10th cousin 22 times removed |
| | | Husband of the 13th cousin 22 times removed |
| | | Husband of the 14th cousin 23 times removed |
| | | Husband of the 15th cousin 21 times removed |
| | | Husband of the 16th cousin 21 times removed |