| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Theophila | - | Ancient Greek | ||
| Theophilos | - | Ancient Greek | ||
| Theophilus | thee-AHF-ə-ləs (English) | Biblical, Ancient Greek (Latinized) | ||
| Theophylaktos | - | Ancient Greek | ||
| Theotimos | - | Ancient Greek | ||
| Theotimus | - | Ancient Greek (Latinized) | ||
| Therapon | - | Late Greek | ||
| Theron | - | Ancient Greek | ||
| Thersa | - | Biblical Latin, Biblical Greek | ||
| Theseus | THEE-see-əs (English) | Greek Mythology | ||
| Thomas | TAHM-əs (English), TOM-əs (English), to-MAH (French), TO-mahs (German, Dutch), tho-MAHS (Greek) | English, French, German, Dutch, Swedish, Norwegian, Danish, Greek, Biblical, Biblical Latin, Biblica | ||
| 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 |