Casimir I, Duke of Cieszyn noble (1280–1358) Parents NN Mieszko I, Duke of Cieszyn Children Agnes of Cieszyn Władysław of Cieszyn Bolesław of Cieszyn Przemyslaus I Noszak, Duke of Cieszyn Jolanta Helena of Cieszyn Anna of Cieszyn Siemowit of Cieszyn Jan of Cieszyn Elisabeth of Cieszyn Siblings Władysław of Oświęcim Viola of Teschen Partners Eufemia of Masovia