| Name | Meaning | Gender | Origin |
|---|
| Theodore | gift of God | Male | Greek |
| Thomas | Twin
| Male | Aramaic |
| Thomas | Twin
| Male | Aramaic |
| Tim | Greek, honoring God | Male | Greek |
| Tina | River
| Female | English |
| Tom | Bartender at the Leaky Cauldron.
| Male | English |
| Tommy | From Thomas - The twin. | Male | English |
| Tony | priceless one | Male | English |
| Tori | Derived from Victoria triumphant.
| Female | English |
| Toshiro | | Unisex | |
| Tricia | noble, patrician | Female | English |
| Trisha | Latin, noble, patrician | Female | English |
| Tristan | A knight
| Male | Celtic |
| Tudor | Variant of Theodor.
| Male | Welsh |
| Uma | after the actress Uma Thurman | Female | Sanskrit |
| Uriah | God is my light
| Male | Hebrew |
| Vickie | | Female | |
| Vicky | victory | Female | English |
| Victoria | Derived from Victoria triumphant
| Female | Latin |
| Warren | watchman, game keeper, enclosure, from La Varenne | Male | |
| Whoopi | | Unisex | Hebrew |
| William | resolute protection | Male | English |
| Willie | English from German, resolute protection | Male | English |
| Wolfgang | traveling wolf | Male | |
| Woody | English, row of houses by a wood | Male | English |