| Name | Meaning | Gender | Origin |
|---|
| Tasha | Russian diminutive of Natalya, birthday of the Lord | Female | English |
| Tattoo | | Unisex | |
| Taxi | | Unisex | |
| Taz | | Male | |
| Texas | | Male | |
| Thea | goddess, sort | Female | Greek |
| Thelma | nursing | Female | Literary |
| Theo | divine gift | Male | English |
| Theodore | gift of God | Male | Greek |
| Thomas | Twin
| Male | Aramaic |
| Thomas | Twin
| Male | Aramaic |
| Thor | Viking mythology: the ruler of the weather | Male | Norse |
| Thumbs | | Unisex | Hebrew |
| Thumper | To walk with heavy steps | Unisex | |
| Tia | Aunt
| Female | Spanish |
| Tibbs | | Unisex | Hebrew |
| Tig | | Unisex | |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tiger Lily | | Unisex | |
| Tigger | from Winnie the Pooh | Unisex | |
| Tiggy | | Unisex | |
| Tilly | Mighty in war
| Female | English |
| Timber | Wood used as a building material. Also timber-wolf. | Male | Nature |
| Timmy | From Timothy - Honoring God | Unisex | |