| Theophilos | | - | Ancient Greek | |
| Theophilus | | thee-AHF-ə-ləs (English) | Biblical, Ancient Greek (Latinized) | |
| Theophylaktos | | - | Ancient Greek | |
| Theotimos | | - | Ancient Greek | |
| Theotimus | | - | Ancient Greek (Latinized) | |
| Theron | | - | Ancient Greek | |
| Thoukydides | | - | Ancient Greek | |
| Thucydides | | thoo-SID-ə-deez (English) | Ancient Greek (Latinized) | |
| Timaeus | | tie-MEE-əs (English) | Ancient Greek (Latinized), Biblical Latin, Biblical | |
| Timaios | | - | Ancient Greek, Biblical Greek | |
| 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 | |