Jan IV of Oświęcim

Duke of Oświęcim and Karniów (1420–1495)

Parents

• Anna żagańska
• Casimir I of Oświęcim

Children

• Helena of Oświęcim

Siblings

• Przemysław of Toszek
• Wenceslaus I of Zator

Partners

• Barbara of Karniów