| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Telesphoros | - | Ancient Greek | ||
| Telesphorus | - | Ancient Greek (Latinized) | ||
| ThaÏS | - | Ancient Greek | ||
| Thais | - | Ancient Greek | ||
| Thales | - | Ancient Greek | ||
| Themistocles | - | Ancient Greek (Latinized) | ||
| Themistokles | - | Ancient Greek | ||
| Theocritus | - | Ancient Greek (Latinized) | ||
| Theodora | thee-ə-DAWR-ə (English) | English, Greek, Ancient Greek | ||
| Theodoros | - | Greek, Ancient Greek | ||
| Theodorus | - | Ancient Greek (Latinized), Dutch | ||
| Theodosia | - | Ancient Greek, Greek | ||
| Theodosios | - | Ancient Greek | ||
| Theodosius | - | Ancient Greek (Latinized) | ||
| Theodotos | - | Ancient Greek |