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
Princess Frederica Caroline of Saxe-Coburg-Saalfeld her husband found her ugly, ignorant and boring. The marriage remained childless, he separated from his wife, who by that time lived at Schwaningen Castle in Unterschwaningen, and began to live with his mistress Elizabeth Craven. Frederica Caroline's brother, Prince Josias of Saxe-Coburg-Saalfeld, owed his sister admission to the regiment as captain, this starting point of his brilliant career military. After Frederica Caroline's death, her husband abdicated as Margrave and sold the Margravate to Prussia, he left the country and married his English mistress that year. Frederica Caroline is buried in the Gumbertuskirche in Ansbach. Princess Frederica Caroline of Saxe-Coburg-Saalfeld