| Name | Meaning | Gender | Origin |
|---|
| Thatcher | Roof repairer | Male | English |
| Theo | Gift of God | Male | Greek |
| Thomas | Twin | Male | Aramaic |
| Thor | Thunder | Male | Norse |
| Thumper | To walk with heavy steps | Unisex | English |
| Thunder | Stormy Tempered | Unisex | English |
| Tiger | Tiger | Unisex | English |
| Tigger | From Winnie the Pooh | Unisex | English |
| Tike | | Unisex | Hebrew |
| Tiki | Maori figure representing an ancestor. A wooden or stone image of a Polynesian god. | Unisex | English |
| Tillie | Powerful battler | Female | German |
| Tilly | Powerful battler | Unisex | Germanic |
| Timber | Wood used as a building material. Also timber-wolf. | Unisex | English |
| Timmy | To honor God, to fear God | Male | Greek |
| Timon | Respect god | Male | Greek |
| Tina | Follower of Christ | Female | Latin |
| Tink | | Unisex | Hebrew |
| Tinker | | Unisex | Hebrew |
| Tinkerbell | | Unisex | Hebrew |
| Tinkerbelle | Named after the fairy... Peter Pan's little sidekick! | Unisex | English |
| Tino | From the god Mars | Male | Latin |
| Tinsy | | Unisex | Hebrew |
| Tiny | Extremely small | Unisex | English |
| Tipper | Nickname And Variant Of The Irish Name Tabar Meaning A Well. | Unisex | English |
| Titan | Powerful big man | Unisex | Greek |
| Tiva | Good | Female | Hebrew |
| Toby | God is good | Unisex | Hebrew |
| Toffee | A hard brown, chewy candy | Unisex | English |
| Toni | Abbreviation Of Antonia And Antoinette. | Female | Latin |
| Treacle | | Unisex | Hebrew |