George Frederick of BrandenburgAnsbach was Margrave of Ansbach and Bayreuth, as well as Regent of Prussia. He was the son of George, Margrave of BrandenburgAnsbach and a member of the House of Hohenzollern. He married firstly, in 1559, Elisabeth of BrandenburgKstrin . He married secondly, in 1579, Sophie of BrunswickLneburg , daughter of William of BrunswickLneburg and Dorothea of Denmark.
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Source: Wikipedia