John, Margrave of Brandenburg-Küstrin Margrave of Brandenburg-Küstrin (1513-1571) (1513–1571) Parents Elizabeth of Denmark, Electress of Brandenburg Joachim I Nestor, Elector of Brandenburg Children Elisabeth of Brandenburg-Küstrin Catherine of Brandenburg-Küstrin Siblings Joachim II Hector, Elector of Brandenburg Elisabeth of Brandenburg, Duchess of Brunswick-Calenberg-Göttingen Margaret of Brandenburg Anna of Brandenburg Partners Catherine of Brunswick-Wolfenbüttel, Margravine of Brandenburg-Küstrin
