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| Liuva II | 601 | 603 | Visigoths | ||
| Liutprand | 712 | 744 | Lombards | ||
| Liutpert | 700 | 701 | Lombards | ||
| Licinia Eudoxia | 437 | 455 | Western Roman Empire | ||
| Libius Severus | 461 | 465 | Western Roman Empire | ||
| Leontios II | 695 | 698 | Eastern Roman Empire | ||
| Leontios I | 484 | 488 | Eastern Roman Empire | ||
| Leo III | 717 | 741 | Eastern Roman Empire | ||
| Leo II and Zeno | 474 | 474 | Eastern Roman Empire | ||
| Leo II | 474 | 474 | Eastern Roman Empire | ||
| Leo I or Zeno | 457 | 491 | Eastern Roman Empire | ||
| Leo I | 457 | 474 | Eastern Roman Empire | ||
| Kirada | 335 | 345 | Kidarites | ||
| Kipunadha | 335 | 350 | Kushanshahs | ||
| Kidara | 350 | 390 | Kidarites | ||
| Khusro IV | 630 | 636 | Sasanians | ||
| Khusro III | 630 | 630 | Sasanians | ||
| Khusro II | 590 | 628 | Sasanians | ||
| Khusro I | 531 | 579 | Sasanians | ||
| Khurshid of Tabaristan | 740 | 760 | Dabuyid dynasty |