Eleanor of Prussia daughter of Duke Albert Frederick of Prussia; by marriage Electress of Brandenburg (1583–1607) Parents Marie Eleonore of Cleves Albert Frederick of Prussia Children Marie Eleonore von Brandenburg Siblings Duchess Magdalene Sibylle of Prussia Marie of Prussia, Margravine of Brandenburg-Bayreuth Duchess Anna of Prussia Duchess Sophie of Prussia Wilhelm Friedrich von Hohenzollern Albrecht Friedrich von Hohenzollern Partners Joachim Frederick, Elector of Brandenburg