| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Tessa | TES-ə | English | ||
| Tessie | TES-ee | English | ||
| Tetty | TET-ee | English (Archaic) | ||
| Teutorigos | - | Ancient Celtic | ||
| Tex | TEKS | English | ||
| ThÉO | te-O | French | ||
| ThÉOdore | te-o-DOR | French | ||
| ThÉOphile | te-o-FEEL | French | ||
| ThÉOtime | te-o-TEEM | French | ||
| ThÉRÈSe | te-REZ | French | ||
| ThaÏS | - | Ancient Greek | ||
| Thad | THAD | English | ||
| Thaddeus | THAD-ee-əs (English) | English, Biblical, Biblical Latin | ||
| Thais | - | Ancient Greek | ||
| Thales | - | Ancient Greek |