Anna of Brunswick-Grubenhagen-Einbeck daughter of Duke Eric I of Brunswick-Grubenhagen and wife of Duke Albert III of Bavaria (1414–1474) Parents Elisabeth of Brunswick-Göttingen Eric I, Duke of Brunswick-Grubenhagen Children Albert IV, Duke of Bavaria Margaret of Bavaria, Marchioness of Mantua Elisabeth of Bavaria, Electress of Saxony Barbara von Bayern John IV, Duke of Bavaria Sigismund, Duke of Bavaria Christoph the Strong Elisabeth von Honstein-Kletterberg Heinrich X von Honstein-Kletterberg Siblings Margaret of Brunswick-Grubenhagen Henry III, Duke of Brunswick-Grubenhagen Agnes of Brunswick-Grubenhagen Elisabeth of Brunswick-Grubenhagen Albert II, Duke of Brunswick-Grubenhagen Ernest II, Duke of Brunswick-Grubenhagen Sophie von Braunschweig-Grubenhagen Partners Frederick III, Duke of Brunswick-Lüneburg Albert III, Duke of Bavaria