| Themis | | - | Greek Mythology | |
| Theseus | | THEE-see-əs (English) | Greek Mythology | |
| Thor | | THOR (English), TOR (Danish), TOOR (Swedish, Norwegian) | Norse Mythology, Danish, Swedish, Norwegian | |
| Thoth | | - | Egyptian Mythology (Hellenized) | |
| Tiamat | | TEE-ə-maht (English), TYAH-maht (English) | Near Eastern Mythology | |
| Tisiphone | | - | Greek Mythology | |
| Tiw | | - | Anglo-Saxon Mythology | |
| Tlaloc | | TLAH-lok | Aztec And Toltec Mythology | |
| Tuulikki | | TOO:-leek-kee (Finnish) | Finnish, Finnish Mythology | |
| Tyr | | TIR | Norse Mythology | |
| Ukko | | OOK-ko (Finnish) | Finnish, Finnish Mythology | |
| Ulysses | | yoo-LIS-eez (English) | Roman Mythology, English | |
| Urania | | yuw-RAY-nee-ə (English) | Greek Mythology (Latinized) | |
| Uranus | | yuw-RAY-nəs (English), YUWR-ən-əs (English) | Greek Mythology (Latinized) | |
| Urd | | - | Norse Mythology | |