| Titianus | | - | Ancient Roman | |
| Titus | | TI-tuws (Ancient Roman), TIE-təs (English) | Ancient Roman, English, Biblical, Biblical Latin | |
| Touthmosis | | - | Ancient Egyptian (Hellenized) | |
| Traianus | | - | Ancient Roman | |
| Tryggvi | | - | Icelandic, Ancient Scandinavian | |
| Tryphaina | | - | Biblical Greek, Ancient Greek | |
| Tryphon | | - | Ancient Greek | |
| Tryphosa | | - | Biblical, Biblical Greek, Ancient Greek | |
| Tullia | | - | Italian, Ancient Roman | |
| Tullius | | - | Ancient Roman | |
| Tutankhamon | | too-tahng-KAH-mən (English) | Ancient Egyptian | |
| Tycho | | TIE-ko (English) | Ancient Greek (Latinized) | |
| Tychon | | - | Ancient Greek | |