| Tiffany | | TIF-ə-nee | English | |
| Tiffiny | | TIF-ə-nee | English (Rare) | |
| Tiger | | TIE-gər | English (Rare) | |
| Tilda | | TEEL-dah (Finnish) | English, Swedish, Finnish | |
| Tillie | | TIL-ee | English | |
| Tilly | | TIL-ee | English | |
| Tim | | TIM (English, German, Dutch, Slovene) | English, German, Dutch, Slovene, Swedish, Norwegian, Danish | |
| Timmy | | TIM-ee | English | |
| Timotha | | TIM-ə-thə | English (Rare) | |
| Timothy | | TIM-ə-thee (English) | English, Biblical | |
| Tina | | TEE-nə (English), TEE-nah (Italian, Dutch) | English, Italian, Dutch, Slovene, Croatian, Macedonian | |
| Tisha | | TISH-ə | English, African American | |
| Titty | | TIT-ee | English | |
| Titus | | TI-tuws (Ancient Roman), TIE-təs (English) | Ancient Roman, English, Biblical, Biblical Latin | |
| Tobias | | to-BEE-ahs (German), tə-BIE-əs (English) | Biblical, German, Swedish, Norwegian, Danish, English, Biblical Latin, Biblical Greek | |