| Name | Birth date | Relationship with Floyd Williams |
|---|
| Strand, Walter | | Half granduncle |
| Streadhuine, Faichadr | WFT Est. 199-264 | 56th great-grandfather |
| | | 19th cousin 54 times removed |
| Sturdivant, La Verne L. | September 23, 1908 | Wife of the grandfather |
| Sunno | WFT Est. Bef. 130 | 57th great-grandfather |
| Suppo II | Bef. 840 | 35th great-grandfather |
| Susanna | WFT Est. 904-961 | 31st great-grandmother |
| | | Wife of the 3rd cousin 34 times removed |
| | | Wife of the 4th cousin 34 times removed |
| Suzanna | WFT Est. 935-966 | 31st great-grandmother |
| | | Wife of the 2nd cousin 33 times removed |
| Svegdi Fjolnarsson | Abt. 277 | 60th great-grandfather |
| Sviede, Norse And Viking King | WFT Est. 671-725 | 39th great-grandfather |
| Swynford, Anna | WFT Est. 1351-1390 | 18th great-grandmother |
| Swynford, William | WFT Est. 1312-1363 | 19th great-grandfather |
| Sykes, David James | Private | 1st cousin once removed of the wife |
| Sykes, Lindsay Marie | Private | 1st cousin once removed of the wife |
| Teachtman, Feidhlinhidth, 108Th King | WFT Est. Bef. 100 | 61st great-grandfather |
| | | 14th cousin 59 times removed |
| Teachtman, Fiachadh | WFT Est. Bef. 100 | 63rd great-grandfather |
| | | 12th cousin 61 times removed |
| Teachtman, Tuathal, 106Th King Of Ireland | WFT Est. Bef. 100 | 62nd great-grandfather |
| | | 13th cousin 60 times removed |
| Tenuantius | WFT Est. Bef. 100 | 61st great-grandfather |
| Terrell, Avery | 1647 | 7th great-granduncle |
| | | Half 23rd cousin 9 times removed |
| Terrell, Charles | November 9, 1627 | 8th great-granduncle |
| | | Half 22nd cousin 10 times removed |
| Terrell, Edward | WFT Est. 1504-1547 | 11th great-grandfather |
| | | Half 19th cousin 13 times removed |
| | | 22nd cousin 13 times removed |
| | | 23rd cousin 14 times removed |
| Terrell, George | WFT Est. 1466-1520 | 12th great-grandfather |
| | | Half 18th cousin 14 times removed |
| | | 21st cousin 14 times removed |
| | | 22nd cousin 15 times removed |
| | | 23rd cousin 13 times removed |
| | | 23rd cousin 15 times removed |
| Terrell, Humphrey | WFT Est. 1498-1508 | 13th great-grandfather |
| | | Half 17th cousin 15 times removed |
| | | 20th cousin 15 times removed |
| | | 21st cousin 16 times removed |
| | | 22nd cousin 14 times removed |
| | | 23rd cousin 14 times removed |
| | | 22nd cousin 16 times removed |
| | | 23rd cousin 15 times removed |
| Terrell, Joan | April 5, 1626 | 8th great-grandaunt |
| | | Half 22nd cousin 10 times removed |
| Terrell, John | June 25, 1618 | 8th great-granduncle |
| | | Half 22nd cousin 10 times removed |