| Theodore | - | Cameroon Name | Theodorus | - | Dutch Name |
| Theon | - | Greek Name | Théophile | - | Cameroon Name |
| Theophilus | - | Biblical Name | Theron | - | United States Name |
| Therun | - | Cyprien Name | Thessalonica | - | Biblical Name |
| Theudas | - | Biblical Name | Thevan | - | Indian Name |
| Thiago | - | Portuguese Name | Thierry | - | French Name |
| Thinakaran | - | Indian Name | Thinh | - | Vietnamese Name |
| Thiraphong | - | Thai Name | Thirugnanam | - | Indian Name |
| Thirumal | - | Indian Name | Thirumalai | - | Indian Name |
| Thirumani | - | Indian Name | Thiruvalluvar | - | Indian Name |
| Tho | - | Vietnamese Name | Thomas | - | Biblical Name |
| Thomas Gilbert | - | Icelandic Name | Thompson | - | United States Name |
| Thongchai | - | Thai Name | Thooyavan | - | Indian Name |
| Thor | - | Danish Name | Thorbjorn | - | Norse Name |
| Thorbrand | - | Norse Name | Thorgeir | - | Norse Name |
| Thorgrim | - | Norse Name | Thorin | - | Norse Name |
| Thorleif | - | Norse Name | Thormod | - | Norse Name |
| Thorne | - | English Name | Thorodd | - | Norse Name |
| Thorolf | - | Norse Name | Thorsten | - | Norse Name |
| Thorvald | - | Norse Name | Thoth | - | Egyptian Name |
| Thour | - | Scandinavian Name | Thuan | - | Vietnamese Name |
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