| Name | Meaning | Gender | Origin |
|---|
| Teal | The Bird Teal: Also The Blue-Green Color. | Unisex | English |
| Tempest | Storm | Female | English |
| Temple | House of worship | Unisex | English |
| Templeton | House of the Knights Templar settlement | Male | English |
| Terra | Earth, soil | Female | Latin |
| Terran | Terran Means Earthman. Variants Are Contemporary Rhyming Blends Of Ter- Plus Darin. | Unisex | English |
| Tex | Of Texas | Unisex | English |
| Theo | Gift of God | Male | Greek |
| Theresa | Harvester | Female | Greek |
| Thistle | Thistle | Female | English |
| Thorne | Thorn bush | Male | English |
| Thornton | Thorn bush enclosure or settlement | Male | English |
| Thorpe | Hamlet | Male | Norse |
| Thurlow | Hill of thor | Male | English |
| Thurston | Thor's stone, Thor's settlement | Male | English |
| Tibor | The river Tiber | Male | Latin |
| Tierra | Earth | Female | Spanish |
| Tiger | Tiger | Unisex | English |
| Tilden | Fertile valley | Male | English |
| Tirzah | Pleasantness | Female | Hebrew |
| Topaz | Topaz | Female | English |
| Townsend | Standing at the end of a village | Male | English |
| Tracy | Thracius' place | Female | English |
| Travis | Toll collector | Male | French |
| Tremain | Rock settlement | Male | Cornish |
| Trenton | Trent's town | Male | English |
| Trevin | | Male | Hebrew |
| Troy | Troyes | Female | French |
| Tuwa | Earth | Female | Native American |
| Tyrone | Land of the noble | Male | Gaelic |