| Tisiphone | | - | Greek Mythology | |
| Titos | | - | Biblical Greek | |
| Tobias | | to-BEE-ahs (German), tə-BIE-əs (English) | Biblical, German, Swedish, Norwegian, Danish, English, Biblical Latin, Biblical Greek | |
| Tobith | | - | Biblical Greek | |
| Tryfon | | - | Greek | |
| Tryphaina | | - | Biblical Greek, Ancient Greek | |
| Tryphon | | - | Ancient Greek | |
| Tryphosa | | - | Biblical, Biblical Greek, Ancient Greek | |
| Tycho | | TIE-ko (English) | Ancient Greek (Latinized) | |
| Tychon | | - | Ancient Greek | |
| Urania | | yuw-RAY-nee-ə (English) | Greek Mythology (Latinized) | |
| Uranus | | yuw-RAY-nəs (English), YUWR-ən-əs (English) | Greek Mythology (Latinized) | |
| Vangelis | | - | Greek | |
| Varvara | | vahr-VAH-rah (Russian) | Russian, Greek, Bulgarian, Macedonian | |
| Vasiliki | | - | Greek | |