Frederick of Brandenburg may refer to: Frederick I, Elector of Brandenburg (1371–1440) Frederick II, Elector of Brandenburg (1413–1471), son of previous Frederick I, Margrave of Brandenburg-Ansbach (1460–1536) Frederick of Brandenburg (1530–1552), Prince-Archbishop of Magdeburg Frederick IX, Margrave of Brandenburg (1588–1611) Frederick III, Margrave of Brandenburg-Ansbach (1616–1634) Elector Frederick III of Brandenburg who became King Frederick I of Prussia (1657–1713) Frederick, Margrave of Brandenburg-Bayreuth (1711–1763) Elector Frederick IV of Brandenburg, also King Frederick II of Prussia (1712–1786)