| Timon | | TIE-mən (English), TEE-mawn (Dutch) | Ancient Greek, Biblical, Biblical Greek, Biblical Latin, Dutch | |
| Timoteus | | - | Ancient Greek (Latinized) | |
| Timothea | | - | Ancient Greek, Greek | |
| Timotheos | | - | Ancient Greek, Biblical Greek | |
| Titiana | | - | Ancient Roman | |
| 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 | |