Dukes of Silesia Herzöge von Schlesien Records #4 Holders Family filter On/Off Bernard II, duke of Silesia Boleslav II, duke of Silesia-Münsterberg * c. 1300 Boleslaw I, duke of Silesia * c. 1125 Kasimir III. duke of Silesia-Cosel Corrections and Updates To suggest a correction or an update. Click Here