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| Toramana | 493 | 515 | Alchons | ||
| Tiberius III Apsimar | 698 | 705 | Eastern Roman Empire | ||
| Tiberius II Constantine | 578 | 582 | Eastern Roman Empire | ||
| Thrasamund | 496 | 523 | Vandals | ||
| Theuderic IV | 721 | 737 | Merovingians | ||
| Theuderic III | 673 | 691 | Merovingians | ||
| Theuderic II | 595 | 613 | Merovingians | ||
| Theuderic I | 511 | 534 | Merovingians | ||
| Theudebert II | 595 | 612 | Merovingians | ||
| Theudebert I | 534 | 548 | Merovingians | ||
| Theudebald | 548 | 555 | Merovingians | ||
| Theodosius II or Valentinian III | 402 | 455 | Roman Empire | ||
| Theodosius II or Leo I | 402 | 474 | Eastern Roman Empire | ||
| Theodosius II | 402 | 450 | Eastern Roman Empire | ||
| Theodosius I or Theodosius II | 379 | 450 | Eastern Roman Empire | ||
| Theodosius I or Honorius | 379 | 423 | Roman Empire | ||
| Theodosius I or Arcadius | 379 | 408 | Roman Empire | ||
| Theodosius I | 379 | 395 | Roman Empire | ||
| Theodosios III | 715 | 717 | Eastern Roman Empire | ||
| Theodora (4th century) | 337 | 340 | Roman Empire |