Jan IV of Oświęcim
Jan IV of Oświęcim (Polish: Jan IV oświęcimski; 1426/1430 – by 21 February 1497), was a Duke of Oświęcim during 1434–1456 (until 1445 with his brothers as co-rulers) and Duke of Gliwice from 1465 to 1482.
Jan IV | |
|---|---|
| Duke of Oświęcim, Gliwice | |
Coat-of-arms of Upper Silesia (Opole, Oświęcim, Gliwice, etc). | |
| Born | 1426/1430 |
| Died | by 21 February 1497 |
| Noble family | Silesian Piasts of Opole |
| Spouse(s) | Katharina Barbara of Karniów |
| Issue | Helena of Oświęcim |
| Father | Casimir I of Oświęcim |
| Mother | Anna of Żagań |
He was the third son of Duke Casimir I of Oświęcim by his first wife Anna, daughter of Duke Henry VIII of Żagań.
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