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 Holland. In mid-1735, Frederick, Prince of Wales, was further dismayed when Caroline, rather than himself, again acted as regent while the King was absent in Hanover. The King and Queen arranged Frederick's marriage, in 1736, to Princess Augusta of Saxe-Gotha. Shortly after the wedding, George went to Hanover, and Caroline resumed her role as "Protector of the Realm". As regent, Caroline considered the reprieve of Captain John Porteous, who had been convicted of murder in Edinburgh. Before she could act, a mob stormed the jail where he was held and killed him. Caroline was appalled. The King's absences abroad were