Dukes of Schlesvig-Holstein-Norburg-Plön Herzöge von Schleswig-Holstein-Norburg-Plön Records #3 Holders Family filter On/Off August, duke of Schleswig-Holstein-Norburg-Plön * 1635 Joachim Frederick, duke of Schleswig-Holstein-Norburg-Plön-Norburg * 1668 Johann Adolf, duke of Schleswig-Holstein-Sonderburg-Plön * 1634 Corrections and Updates To suggest a correction or an update. Click Here