Bolesław III Wrymouth
The Polish surname Dunin originated in the 12th century with Piotr Włost Dunin. He was Palatine of Poland and the castellan of Wroclaw (Silesia), as well as, Brother in law of Duke Bolesław III Wrymouth (Boleslaw Krzywousty). The coat of arms is the Łabędź (swan). See: Duninowie family.