| Name | aka | Birth date | Birth location | Marriage date | Marriage location | Death date | Death location |
| Theobald I, Count of Blois | | Abt. 915 | | Bef. 945 | | January 16, 974/75 | |
| Theobald II, Count of Blois | | Abt. 1019 | | | | 1043 | Tours, France |
| Theobald III, Count of Blois 4 | | 1093 | Blois, Loir-et-Cher, France | 1123 | | January 8, 1151/52 | |
| Theudebert II of Austrasia, King of Austrasia | | | | | | 612 | |
| Theudebert of Saxony, Duke of Saxony | Dietrich of Saxony | | | | | 920 | |
| Thibaut I, King of Navarre | | 1201 | Navarre, Spain | March 1231/32 | | July 14, 1253 | |
| Thibaut, Count of Champagne | | 1177 | Champagne, France | 1195 | | May 24, 1201 | |
| Thierry II de Lorraine, Duke of Lorraine | | Abt. 1044 | Alsace, France | 1095 | | January 23, 1114/15 | |
| Thierry of Alsace de Lorraine | Dietrich d'Alsace | Abt. 1099 | Alsace, France | 1134 | | January 17, 1167/68 | |
| Deborah Thing | | | | | | | |
| Elizabeth Thing | | | | | | | |
| Joanna Thing | | | | January 27, 1714/15 | | November 16, 1727 | |
| Jonathan Thing | | | | | | | |
| Jonathan Thing | | | | | | | |
| Samuel Thing | | | | | | | |
| Thomas I, Count of Savoy | | March 20, 1176/77 | Carbonierres, Savoy, France | May 1195 | | January 20, 1232/33 | Aoste, Isere, France |
| Aldon Thomas | | | | | | | |
| Anna Ruth Thomas | | November 2, 1934 | Morristown, Tennessee | January 24, 1958 | Morristown, Tennessee | | |
| John Thompson | | | | | | | |
| Thored, Ealdorman of York | | | | | | | |
| Susanna Thorne | | March 5, 1559/60 | Yardley-Hastings, England | 1575 | Northampton, England | 1577 | Northampton, England |
| Thomas Thorne | | 1521 | Yardley, Hasting, England | Abt. 1549 | England | November 9, 1588 | Yardley, England |
| William Thorne | | 1490 | Yardley, England | WFT Est. 1509-1521 | | WFT Est. 1528-1581 | |
| Elizabeth Thornton | | WFT Est. 1430-1465 | | WFT Est. 1445-1480 | | WFT Est. 1462-1546 | |
| Roger Thornton | | WFT Est. 1400-1431 | | WFT Est. 1441-1474 | | WFT Est. 1441-1512 | |
| Francis Thorowgood | | | | | | | |
| Connie Sue Threadgill | | November 29, 1950 | | January 31, 1987 | Houston, Texas | | |
| Lancelot (of Torworth) Threlkeld | | WFT Est. 1443-1472 | Yanwith, Cumberland, England | WFT Est. 1467-1514 | | WFT Est. 1497-1557 | |
| Margaret Grace Threlkeld | | 1494 | | WFT Est. 1530-1547 | | 1551 | |
| Edmund Hugh Throckmorton | | February 19, 1888 | | | | January 1963 | |
| Mary Eleanor Throckmorton | | June 10, 1890 | | | | | |
| Warner Throckmorton | | October 12, 1894 | | | | August 1971 | |
| Warner Thomson Throckmorton | | April 8, 1861 | Romney, Indiana | February 22, 1887 | Romney, Indiana | January 11, 1937 | |
| Lela Tibbets | | | | | | | |
| Tortulf the Woodman | | | | | | | |
| Virginia Totten | | | | | | | |
| William Totten | | | | June 4, 1829 | | | |
| Patricia Townsend | | February 24, 1928 | | August 20, 1949 | | | |
| Trehaern ap Caradoc, King of N. Wales | | | | | | 1079 | |
| James Treworgie | | | | | | | |
| Rachel Tritt | | | | September 20, 1817 | Boardman Township, Ohio | | |
| Tróán | | | | | | | |
| Trór | Thor | | | | | | |
| Betty (Bessie) Truxel | | | | | | | |
| Clarence Truxel | | | | | | | |
| Clyde Truxel | | 1916 | | | | | |
| Lester Truxel | | 1894 | | | | | |
| Lester (Bud) Truxel | | | | | | | |
| Mary Truxel | | | | | | | |
| Maxine Ellen Truxel | | | | | | | |