Johann was born about 1297, the son of Gerhard II von Holstein-Plön and Agnes von Brandenburg. The place is not known.
He died on 27 SEP 1359. The place is not known.
He had two marriages/partners. His first wife was Katharina von Schlesien-Glogau, who he married in 1319. The place has not been found. Their four known children were Agnes (?-c1386), Elisabeth (?-<1410), Adolf VII (IX) (c1327-1390) and Mechthild (?-?).
His second wife was Mirozlawa von Wittenberg, who he married in 1327. The place has not been found. Their only known child was Miroslawa (?-c1376).
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Johann III von Holstein-Plön |
Gerhard II von Holstein-Plön |
Gerhard I von Holstein-Itzehoe |
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Elisabeth von Mecklenburg |
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Agnes von Brandenburg |
Johann I von Brandenburg |
Albrecht von Brandenburg |
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Mathilde von der Lausitz |
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Brigitte Jutta von Sachsen |
Albrecht I von Sachsen |
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Agnes von Thüringen |
| Event | Date | Details | Source | Multimedia | Notes |
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| Birth | ABT 1297 |
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| Death | 27 SEP 1359 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | FROM 1314 TO 1359 | graf von Holstein-Plön | ||||
| Nobility Title | FROM 1316 TO 1359 | graf von Holstein-Kiel |