The eldest son of Prince Przemysław Noszak and Elżbieta. There are strong indications that Przemysław's father planned to bequeath him the part of the Bytom lands belonging to the Cieszyn Princes. He was murdered on his way from Gliwice to Cieszyn near Rybnik by Marcin the Bohemian (also called Chrzan), contracted by Prince Jan II of Opava and Racibórz. It is wrongly claimed that Małgorzata, the daughter of Prince Jan I of Opava and Racibórz, was his wife. The consanguinity between Przemysław's son, Kazimierz and his second wife Małgorzata of Racibórz, the daughter of Jan II, throws this into question. 

(K. Jasiński, Rodowód, pp. 149-150)