John III
John III is the name of the following people:
- John III (Pope) († 574), Pope
- John III (Jerusalem) († 524), Orthodox bishop and from 516 until his death Patriarch of Jerusalem
- John III (Olomouc) († 1157), Bishop of Olomouc
- John III († 1300), Archbishop of Riga; see: Johannes von Schwerin
- John III († between 1406 and 1409), Bishop of Cammin; see: Johannes Brunonis
- John III Büttner († 1540), abbot of Münsterschwarzach
- John III Wolf († 1540), Abbot of Ebrach
- John III (Byzantium) (1193–1254), Byzantine emperor
- John III (Trebizond) (around 1321–1362), Emperor of Trebizond
- John III (Ethiopia) (1797 – after 1851), Emperor of Ethiopia
- John III von Elbogen (* before 1300), abbot of the Waldsassen monastery from 1310 to 1323
