List of state leaders in 842

[edit] Asia

Bohai/Balhae - Da Yizhen/Dae I-jin, King of Bohai/Balhae (830-857)
China (Tang Dynasty) - Wuzong, Emperor of Tang China (840-846)
Gurjara - Mihira Bhoja I, Pratihara King of Gurjara (c. 836-886)
Japan (Heian Period) - Emperor Nimmyō, emperor of Japan (833-850)
Silla - Munseong, King of Silla (839-857)

Asturias -
1. Alfonso II the Chaste, King of Asturias (791-842)
2. Nepocian, King of Asturias (842)
3. Ramiro I, King of Asturias (842-850)
Bulgaria - Presian, Khan of Bulgaria (836-852)
East Anglia¹ - Æthelweard, King of East Anglia (839–855)
England - Æthelwulf of Wessex, Bretwalda (839–856)
Frankish Empire - Lothair I, Holy Roman Emperor (823-855)
Mercia - Beorhtwulf, King of Mercia (840–852)
Northumbria¹ - Æthelred II, King of Northumbria (841–844)
Ireland -
- Nial Caille, High King of Ireland (832–844)
- Turgesius of Norway, High King of Ireland (832–845)
Picts -
1. Uurad, King of the Picts (839–842)
2. Brude VI, King of the Picts (842–842)
3. Kenneth, King of the Picts (842–843)
Strathclyde - Arthgal f Dyfnwal, King of Strathclyde (816–872)
Venice - Pietro Tradonico, Doge of Venice (837-864)
Wales - Merfyn Frych ap Gwriad, King of Gwynedd (825–844)

Though East Anglia, Northumbria and Mercia are traditionally perceived to have been in the heptarchy they were largely independent kingdoms until its conquest by the Danes in 869 and 867, respectively - where Mercia was conquered by Wessex in 874. All other members of the heptarchy had been conquered by Wessex and by this time had no form or king.