Helvig of Schauenburg German noblewoman (1400–1436) Parents Catherine Elisabeth of Brunswick-Lüneburg Gerhard VI, Count of Holstein-Rendsburg Children Maurice IV, Count of Oldenburg Gerhard VI Adelheid of Oldenburg Christian I of Denmark Siblings Ingeborg of Holstein Adolphus VIII of Holstein Gerhard VII, Count of Holstein-Rendsburg Henry IV, Count of Holstein-Rendsburg Partners Balthasar of Werle Dietrich, Count of Oldenburg