| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| THESEUS | THEE-see-əs (English) | Greek Mythology | ||
| THEUDELINDA | - | Ancient Germanic | ||
| THEUDEMAR | - | Ancient Germanic | ||
| THEUDHAR | - | Ancient Germanic | ||
| THEUDOBALD | - | Ancient Germanic | ||
| THEUDOFRID | - | Ancient Germanic | ||
| THEUDORICUS | - | Ancient Germanic (Latinized) | ||
| THEUN | TUUN | Dutch | ||
| THEUNIS | TUU-nis | Dutch | ||
| THEUTRICH | - | Ancient Germanic | ||
| THI | - | Vietnamese | ||
| THIAGO | - | Portuguese (Brazilian) | ||
| THIBAULT | tee-BO | French | ||
| THIEMO | - | German, Dutch, Ancient Germanic | ||
| THIERRY | tee-e-REE | French |