The Johann Friedrich Margrave of Brandenburg-Ansbach reference article from the English Wikipedia on 24-Jul-2004
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Johann Friedrich Margrave of Brandenburg-Ansbach

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Johann Friedrich, Margrave of Brandenburg-Ansbach (October 18, 1654 - March 22, 1686), succeeded his father Albrecht V as margrave in 1667. He married his second wife Eleanor Erdmuthe Louise of Saxe-Eisenach on November 4, 1681 . Their daughter Wilhelmine Charlotte Caroline, Markgravine of Brandenburg-Ansbach (Caroline of Ansbach) married George II of Great Britain before he became king.