John III of Grumbach explained
John of Grumbach (de|Johann von Grumbach) (?–1466) was prince-bishop of Würzburg as "John III" from 1455 until his death in 1466.
Literature
- Alfred Wendehorst: Das Bistum Würzburg Teil 3 - Die Bischofsreihe von 1455 bis 1617. (= Germania Sacra; Neue Folge 13). Berlin, 1969. pp. 3–20 (digitalised)
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