William Frederick, Margrave of Brandenburg-Ansbach in Unterreichenbach and was succeeded by his son Charles William Frederick, called "The Wild Margrave". William Frederick, Margrave of Brandenburg-Ansbach William Frederick, Margrave of Brandenburg-Ansbach (8 January 1686 – 7 January 1723), was Margrave of the Principality of Brandenburg-Ansbach from 1703 until his death in 1723. He was the younger brother of Caroline of Ansbach and thus brother-in-law of George II of Great Britain. William Frederick was born in Ansbach in 1686 to John Frederick, Margrave of Brandenburg-Ansbach, and his second wife, Eleonore Erdmuthe of Saxe-Eisenach. His two surviving half-brothers, Margraves Christian Albert and George Frederick II, both died unmarried
Caroline of Ansbach endangering the Hanoverian succession. He had heard reports of Caroline's "incomparable beauty and mental attributes". He immediately took a liking to her "good character" and the British envoy reported that George Augustus "would not think of anybody else after her". For her part, Caroline was not fooled by the prince's disguise, and found her suitor attractive. He was the heir apparent of his father's Electorate of Hanover and third-in-line to the British throne of his distant cousin Queen Anne, after his grandmother Dowager Electress Sophia and his father the Elector. On 22 August 1705, Caroline arrived in Hanover for her