| Ted | English, wealthy guardian | Male | English |
| Tennis | | Unisex | Hebrew |
| Terry | Latin clan name of uncertain meaning | Male | English |
| Thomas | Twin
| Male | Aramaic |
| Thomas | Twin
| Male | Aramaic |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tim | Greek, honoring God | Male | Greek |
| Timmy | From Timothy - Honoring God | Unisex | |
| Timon | worthy | Male | Greek |
| Timothy | honoring God | Male | Greek |
| Tisha | Joy, Gladness | Unisex | English |
| Tito | Latin, meaning unknown | Male | Spanish |
| Tobias | From the Hebrew Tobiah Jah is good.
| Male | Greek |
| Todd | fox | Male | English |
| Tom | Bartender at the Leaky Cauldron.
| Male | English |
| Tomas | twin | Male | |
| Tommy | From Thomas - The twin. | Male | English |
| Tony | priceless one | Male | English |
| Tracy | path, road | Male | |
| Trent | the flooder | Male | English |
| Trevor | Neville's toad.
| Male | Welsh |
| Tris | | Unisex | Hebrew |
| Troy | Descendant of the curly haired ones | Male | Irish |
| Ty | Abbreviation For Names Beginning With Ty-. | Male | English |