| Name | Meaning | Gender | Origin |
|---|
| Terra | earth | Female | Latin |
| Tex | Of Texas | Male | English |
| Theo | divine gift | Male | English |
| Theresa | reaper | Female | English |
| Thistle | thistle | Unisex | |
| Thorndike | From The Thorny Dike | Unisex | English |
| Thorne | thorn tree | Male | English |
| Thurston | Thor's jewel. | Male | Scandinavian |
| Tiburon | after a freeway exit in Marin County, CA | Unisex | |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tigris | | Unisex | |
| Tirzah | delight | Female | Hebrew |
| Tlaloc | Aztec mythology: the great rain and fertility god | Unisex | |
| Topaz | A yellow gemstone | Female | Greek |
| Tracy | path, road | Male | |
| Travis | crossing | Male | |
| Troy | Descendant of the curly haired ones | Male | Irish |
| Tyrone | From Owen's territory. County Tyrone in Ireland. The late actor Tyrone Power.
| Male | Irish |
| Umberto | renowned warrior | Male | Italian |
| Unity | Together
| Female | English |
| Upton | from the upper town | Male | English |
| Urban | Of The City | Male | English |
| Usher | | Male | Hebrew |
| Vail | from the valley | Male | Place-name |