| Name | Meaning | Gender | Origin |
|---|
| Thoth | | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thyme | | Female | Hebrew |
| Tiny | Extremely small | Unisex | |
| Tissot | | Unisex | Hebrew |
| Tofu | | Unisex | |
| Topaz | A yellow gemstone | Female | Greek |
| Toupee | | Unisex | Hebrew |
| Trekky | | Unisex | Hebrew |
| Tricky | | Unisex | Hebrew |
| Trilogy | | Unisex | Hebrew |
| Trinity | Three divine persons, The Father, The Son and The Holy Spirit. | Female | Latin |
| Triton | after Neptune's moon | Unisex | |
| Trojan | | Unisex | Hebrew |
| Tulip | | Female | Hebrew |
| Turbo | Driven by a turbine - turbocharged | Unisex | |
| Tutu | | Unisex | |
| Tuvok | after the vulcan character on the Star Trek Voyager tv series | Unisex | |
| Twinkle | | Unisex | |
| Twister | A cyclone or tornado. | Unisex | |
| Uhura | after the female character in Star Trek | Unisex | |
| Uranus | The heavens | Unisex | Latin |
| Van Gogh | | Unisex | |