John III, Count of Holstein-Plön
John III, Count of Holstein-Plön | |
|---|---|
Seal of John the Mild of Holstein-Kiel, c. 1323-1350 Graf von Holstein-Kiel (1316–1359) Graf von Holstein-Plön (1350–1359) | |
| Born | c. 1297 |
| Died | 27 September 1359 |
| Spouse(s) | Catherine of Silesia-Glogau Merislawa of Schwerin-Wittenburg |
| Father | Gerhard II, Count of Holstein-Plön |
| Mother | Agnes of Brandenburg |
John III of Holstein-Plön (c. 1297–1359), called John the Mild, was a Count of Schauenburg and Holstein-Plön and Holstein-Kiel, ruling Holstein-Plön (1312–1316 and again 1350–1359) 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. He was known as “John the Mild”.