. . . . "Frederick of Babenberg" . . . . . . "Frederick the Quarrelsome, Duke of Austria" . . "Frederick of Austria" . . . . . "Frederick II, the Quarrelsome" . . . "Frederick II of Babenberg" . . . . "Frederick II, Duke of Austria" . "1230" . . "Duke Frederick the Warlike" . . . . "Frederick II of Austria" . "Frederick II the Quarrelsome, Duke of Austria" . "1211" . "Frederick II" . . "Duke of Austria" . . . "Duke Frederick II the Quarrelsome" . "Frederick II the Quarrelsome" . "Herzog Friedrich II, der Streitbare" . . "Frederick II, Duke of Austria" . . . . . "Duke Frederick II of Austria" . "Frederick II the Warlike" . . . . "1246" . . . "Frederick the Quarrelsome" . . . . . . . "Frederick the Warlike" . "Frederick II, Duke of Austria" .