Wenceslaus I, Duke of Cieszyn
Member of the Silesian Piasts
Wenceslaus I of Cieszyn, was a Duke of Cieszyn from 1431, Duke of half of Bytom during 1431–1452 and Duke of Siewierz.
He was the oldest son of Duke Bolesław I of Cieszyn by his second wife Euphemia, daughter of Duke Siemowit IV of Masovia. Wikipedia
Born: 1413, Duchy of Teschen
Died: 1474 (age 61 years), Bielsko-Biała, Poland
Grandparents: Przemyslaus I Noszak, Duke of Cieszyn, Siemowit IV, Duke of Masovia, and Alexandra of Lithuania
Parents: Bolesław I, Duke of Cieszyn and Euphemia of Masovia