| Name | Meaning | Gender | Origin |
|---|
| Thea | goddess, sort | Female | Greek |
| Thor | Viking mythology: the ruler of the weather | Male | Norse |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Titus | of the giants | Male | Latin |
| Tizzy | | Female | Hebrew |
| Toby | God is Good | Male | English |
| Tokyo | | Unisex | Hebrew |
| Toshiro | | Unisex | |
| Trigger | | Unisex | |
| Trina | German variation of Katherine | Female | Scandinavian |
| Trixie | she who brings happiness | Female | Latin |
| Trixie | she who brings happiness | Female | Latin |
| Tuff | Fun spelling of tough; strong and resilient. | Unisex | |
| Tulip | | Female | Hebrew |
| Turkey | | Unisex | |
| Twiggy | | Unisex | |
| Twinkle | | Unisex | |
| Tyson | son of a German, son of Ty | Male | English |
| Uma | after the actress Uma Thurman | Female | Sanskrit |
| Ursa | Form of Ursula | Female | Greek |
| Ursula | little female bear | Female | Latin |
| Uzi | My Strength | Male | Hebrew |
| Valencia | brave, strong | Female | Spanish |