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 denied him by the King, and public disagreement over the money drove a further wedge between parents and son. On the advice of Walpole, Frederick's allowance was raised in an attempt to mitigate further conflict, but by less than he had asked. In June 1737, Frederick informed his parents that Augusta was pregnant, and due to give birth in October. In fact, Augusta's due date was earlier and a peculiar episode followed in July in which the prince, on discovering that his wife had gone into labour, sneaked her out of Hampton Court Palace in the middle of the night,