Wenceslaus I of Bohemia
What followed was an "interregnum", a period of several decades during which the status of the country was disputed, and during which Frederick II's duchy fell victim to a prolonged power play between rival forces. During this time there were multiple claimants to the title, including Vladislaus, Margrave of Moravia son of King Wenceslaus I of Bohemia. King Wenceslaus aimed at acquiring the Duchy of Austria by arranging the marriage of Vladislaus to the last Duke's niece Gertrud, herself a potential heir and claimant.