Matilda Von Groitzsch (1185-1225) (1185–1225) Parents Conrad II, Margrave of Lusatia Elisabeth of Greater Poland, Duchess of Bohemia Children Otto III, Margrave of Brandenburg John I, Margrave of Brandenburg Matilda of Brandenburg, Duchess of Brunswick-Lüneburg Elisabeth of Brandenburg, Landgravine of Thuringia Jutta von Brandenburg Siblings Agnes of Landsberg Conrad von der Lausitz Wenceslaus II Partners Albert II, Margrave of Brandenburg