John III, Count of Holstein-Plön
Count of Holstein-Kiel · Historical Figures · Lived 1297 to 1359 · aged 62
John III of Holstein-Plön, called John the Mild, was a Count of Schauenburg and Holstein-Plön and Holstein-Kiel, ruling Holstein-Plön and Holstein-Kiel (1316-1359). Together with Count Gerhard III of Holstein-Rendsburg, John III was the lord ruling in guardianship the Danish Duchy of Schleswig 1332-1340.
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He was known as “John the Mild”.