| Tadtasi | - | Chamoru Name | Tai | - | Chinese Name |
| Tailor | - | English Name | Taima | - | American Name |
| Taithleach | - | Gaelic Name | Taji | - | Japanese Name |
| Tan | - | Vietnamese Name | Taran | - | American Name |
| Tasi | - | Chamoru Name | Tasina | - | Chamoru Name |
| Tatum | - | English Name | Taylor | - | French Name |
| Tayten | - | American Name | Teagan | - | Irish Name |
| Teal | - | American Name | Teenie | - | American Name |
| Teige | - | American Name | Teigen | - | Welsh Name |
| Tennessee | - | American Name | Teoxihuitl | - | Nahuatl Name |
| Terry | - | German Name | Terryal | - | American Name |
| Tex | - | American Name | Thu | - | Vietnamese Name |
| Tiger | - | American Name | Timber | - | American Name |
| Tip | - | American Name | Tlachinolli | - | Nahuatl Name |
| Tlanextli | - | Nahuatl Name | Tlexictli | - | Nahuatl Name |
| Toirdealbach | - | Gaelic Name | Tola | - | Biblical Name |
| Toltecatl | - | Nahuatl Name | Toni | - | English Name |
| Torn | - | American Name | Tory | - | American Name |
| Trace | - | English Name | Tracen | - | American Name |
| Tracy | - | Greek Name | Trapper | - | American Name |
| Tu | - | Vietnamese Name | Tuesday | - | American Name |
| Tuyen | - | Vietnamese Name | Ty | - | American Name |
| Tyler | - | French Name | Tyne | - | English Name |
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