| Timo (3) | | - | Ancient Greek | |
| Timon | | TIE-mən (English), TEE-mawn (Dutch) | Ancient Greek, Biblical, Biblical Greek, Biblical Latin, Dutch | |
| Timoteus | | - | Ancient Greek (Latinized) | |
| Timothea | | - | Ancient Greek, Greek | |
| Timotheos | | - | Ancient Greek, Biblical Greek | |
| 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 | |