George William, Elector of Brandenburg Elector and Margrave of Brandenburg, Duke of Prussia (1595–1640) Parents Duchess Anna of Prussia John Sigismund, Elector of Brandenburg Children Frederick William of Brandenburg Hedwig Sophie of Brandenburg Margravine Louise Charlotte of Brandenburg Siblings Joachim Sigismund von Brandenburg Maria Eleonora of Brandenburg Anna Sophia of Brandenburg Catherine of Brandenburg Partners Elizabeth Charlotte of the Palatinate
