| Name | Meaning | Gender | Origin |
|---|
| Teagan | beautiful | Female | Irish |
| Tempest | storm | Female | Word |
| Theodore | gift of God | Male | Greek |
| Thing | An entity or idea having it's own existence. | Unisex | |
| Thirteen | | Unisex | Hebrew |
| Thor | Viking mythology: the ruler of the weather | Male | Norse |
| Thorne | thorn tree | Male | English |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thurston | Thor's jewel. | Male | Scandinavian |
| Toad | Amphibian related to frogs, with a broader body and rougher skin. | Unisex | |
| Toffee | A hard brown, chewy candy | Male | |
| Tootsie | A girl or young woman. | Unisex | |
| Treat | | Male | Hebrew |
| Tricks | | Unisex | |
| Trickster | | Unisex | Hebrew |
| Trixie | she who brings happiness | Female | Latin |
| Trixie | she who brings happiness | Female | Latin |
| Troll | | Unisex | Hebrew |
| Trouble | A cause of disturbance or difficulty. | Male | |
| Twila | woven with a double thread | Female | English |
| Twilight | | Unisex | |
| Umbra | | Unisex | Hebrew |
| Ursula | little female bear | Female | Latin |