| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Theun | TUUN | Dutch | ||
| Theunis | TUU-nis | Dutch | ||
| Theutrich | - | Ancient Germanic | ||
| Thibault | tee-BO | French | ||
| Thiemo | - | German, Dutch, Ancient Germanic | ||
| Thierry | tee-e-REE | French | ||
| Thietmar | - | Ancient Germanic | ||
| Thijmen | - | Dutch | ||
| Thijs | TIES | Dutch | ||
| Thirza | TIRH-zah | Dutch | ||
| Thoko | TO-ko | Southern African, Chewa | ||
| Thokozani | to-ko-ZAH-nee | Southern African, Chewa | ||
| Thoma | - | Old Church Slavic | ||
| 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 |