John VIII
John VIII is the name of:
- John VIII ( anti-Pope ) ( † after 844 ), anti-pope
- John VIII ( Pope ) ( † 882 ), Pope
- John VIII ( Konstantin Opel ) ( ~ 1010-1075 ), Patriarch of Constantinople Opel
- John VIII (Jerusalem), Patriarch of Jerusalem from 1099 to 1107
- John VIII ( Byzantium ) ( 1392-1448 ), Emperor of the Byzantine Empire
- John VIII Grimholt (also Grymmolt, Grymmelt; ~ 1450-1523 ), German bishop of Lübeck
- Disambiguation