| Name | Meaning | Gender | Origin |
|---|
| Sullivan | black-eyed one | Male | Irish |
| Sunny | Abounding in sunshine, cheerful | Male | Nickname |
| Sweep | To clean with a broom, for example chimney sweep | Unisex | |
| Tabby | | Unisex | |
| Taboo | | Male | |
| Tar | | Unisex | Hebrew |
| Tazz | | Unisex | |
| Teddy | From Edward - Prosperous guardian | Unisex | |
| Tennessee | | Male | Hebrew |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tigger | from Winnie the Pooh | Unisex | |
| Tobias | From the Hebrew Tobiah Jah is good.
| Male | Greek |
| Toby | God is Good | Male | English |
| Tom | Bartender at the Leaky Cauldron.
| Male | English |
| Tommy | From Thomas - The twin. | Male | English |
| Tootsie | A girl or young woman. | Unisex | |
| Trinket | | Unisex | |
| Truffles | Ball shaped chocolate | Unisex | |
| Tweety | | Unisex | Hebrew |
| Twilight | | Unisex | |
| Vamp | | Unisex | Hebrew |