| Tereza | | te-REZ-ah (Romanian) | Czech, Portuguese (Brazilian), Bulgarian, Romanian | |
| Terminus | | - | Roman Mythology | |
| Tertius | | TUR-shəs (English) | Ancient Roman | |
| Theodor | | - | German, Swedish, Norwegian, Danish, Czech, Romanian | |
| Therasia | | - | Late Roman | |
| Thracius | | - | Ancient Roman | |
| Tiberiu | | - | Romanian | |
| Tiberius | | ti-BE-ri-uws | Ancient Roman | |
| Tiburtius | | - | Ancient Roman | |
| Timotei | | - | Bulgarian, Romanian | |
| Titiana | | - | Ancient Roman | |
| Titianus | | - | Ancient Roman | |
| Titus | | TI-tuws (Ancient Roman), TIE-təs (English) | Ancient Roman, English, Biblical, Biblical Latin | |
| Toma (2) | | TO-mah (Croatian, Serbian) | Romanian, Croatian, Serbian, Bulgarian, Macedonian, Georgian | |
| Traian | | - | Romanian | |