| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Theresa | tə-REE-sə (English), tə-RAY-zə (English), te-RE-zah (German) | English, German, Swedish, Norwegian, Danish | ||
| Therese | te-RE-zə (German), te-RES (Swedish), tə-REES (English) | German, Swedish, Norwegian, Danish, English | ||
| Thom | TAHM | English | ||
| Thomas | TAHM-əs (English), TOM-əs (English), to-MAH (French), TO-mahs (German, Dutch), tho-MAHS (Greek) | English, French, German, Dutch, Swedish, Norwegian, Danish, Greek, Biblical, Biblical Latin, Biblica | ||
| Thomasina | tom-ə-SEE-nə | English | ||
| Thorburn | THAWR-bərn | English (Rare) | ||
| Thorley | THAWR-lee | English (Rare) | ||
| Thornton | THAWRN-tən | English | ||
| Thurstan | THUR-stən | English (Rare) | ||
| Tia | TEE-ə | English | ||
| Tiana | tee-AN-ə | English | ||
| Tianna | tee-AN-ə | English (Modern) | ||
| Tiara | tee-AHR-ə | English (Modern) | ||
| Tibby | TIB-ee | English | ||
| Tierney | TEER-nee | Irish, English (Rare) |