Henry IV, Duke of Mecklenburg Duke of Mecklenburg (1417–1477) Parents Catherine of Saxe-Lauenburg, Duchess of Mecklenburg John IV, Duke of Mecklenburg Children Magnus II, Duke of Mecklenburg Balthasar, Duke of Mecklenburg Albert VI, Duke of Mecklenburg John VI, Duke of Mecklenburg Siblings John V Partners Dorothea of Brandenburg, Duchess of Mecklenburg
