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
Sophie of Brandenburg-Ansbach confused with her eponymous aunt (1485–1537), who was also Duchess of Legnica. From her marriage, Sophie had the following children: Sophie of Brandenburg-Ansbach Sophie of Brandenburg-Ansbach (23 March 1535, Ansbach – 22 February 1587, Legnica) was a princess of Brandenburg-Ansbach and by marriage Duchess of Legnica. Sophie was a daughter of the Margrave George of Brandenburg-Ansbach-Kulmbach (1484–1543) from his third marriage to Emilie of Saxony (1516–1591), daughter of the Duke Henry IV of Saxony. She married on 11 November 1560 in Legnica Duke Henry XI of Legnica (1539–1588). The marriage served to consolidate Sophie's father's position as Duke in Silesia.