Asia

• Bohai/Balhae - Da Yuanyu/Dae Won-yu , King of Bohai/Balhae (808-812)
• China (Tang Dynasty) - Xianzong , Emperor of Tang China (806-820)
• Gurjara - Nagabhata II , Pratihara King of Gurjara (805-833)
• Japan (Heian Period) -
  1. Heizei, Emperor of Japan (806-809)
  2. Saga, Emperor of Japan (809-823)
• Silla -
  1. Aejang , King of Silla (800-809)
  2. Heondeok , King of Silla (809-826)

Europe

• Dalriada - Constantine, King of Dalriada (781–820)
• East Anglia - Coenwulf , King of East Anglia (799–821)
• Essex - Sigered , King of Essex (798–825)
• Kent - Baldred , King of Kent (807–825)
• Mercia - Coenwulf I, King of Mercia (796–821)
• Northumbria -
  1. Ælfwald II , King of Northumbria (806/808–808/810)
  2. Eardwulf , King of Northumbria (808–810)
• Ireland - Aedh Oirdnidhe , High King of Ireland (793–817)
• Picts - Constantine, King of the Picts (789–820)
• Strathclyde - Cynan , King of Strathclyde (798–816)
• Wales - Cynan Dindaethwy ap Rhodri , King of Gwynedd (798–816)
• Wessex - Egbert, King of Wessex (802–839)