| Name | Meaning | Gender | Origin |
|---|
| Tom | Bartender at the Leaky Cauldron.
| Male | English |
| Topsy | Topsail | Unisex | English |
| Trouble | A cause of disturbance or difficulty. | Male | |
| Tuppence | British for two pence (coins) | Unisex | |
| Tyler | An English surname frequently used as a first name.
| Male | English |
| Voodoo | | Unisex | |
| Weezie | | Unisex | Hebrew |
| Wellington | From the wealthy estate
| Male | |
| Whiskers | | Unisex | |
| William | resolute protection | Male | English |
| Willie | English from German, resolute protection | Male | English |
| Willow | Slender:graceful. From the willow tree noted for slender graceful branches and leaves.
| Female | English |
| Winnie | From Winifred - Peaceful friend | Female | English |
| Wrigley | | Unisex | |
| Yum | | Unisex | |
| Zed | God Is Just, Fair | Male | English |
| Zelda | gray warrior | Female | |
| Zoe | life | Female | Greek |
| Zoom | | Unisex | |