| Name | Meaning | Gender | Origin |
|---|
| Sylvester | A cartoon cat that tried to eat the bird character Tweety. He was a black and white cat.
| Male | Latin |
| Tabby | | Unisex | |
| Tabitha | gazelle, roe-buck | Female | Aramaic |
| Tarzan | | Male | |
| Tasha | Russian diminutive of Natalya, birthday of the Lord | Female | English |
| Taz | | Male | |
| Tazer | | Unisex | |
| Teddy | From Edward - Prosperous guardian | Unisex | |
| 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 |
| Tigger | from Winnie the Pooh | Unisex | |
| Tinkerbell | | Unisex | |
| Toby | God is Good | Male | English |
| Tom | Bartender at the Leaky Cauldron.
| Male | English |
| Tommy | From Thomas - The twin. | Male | English |
| Tommy Tommy | | Unisex | |
| Trixie | she who brings happiness | Female | Latin |
| Trixie | she who brings happiness | Female | Latin |
| Trouble | A cause of disturbance or difficulty. | Male | |
| Truffles | Ball shaped chocolate | Unisex | |
| Tucker | Tucker of doth
| Male | English |
| Whiskers | | Unisex | |
| Willie | English from German, resolute protection | Male | English |