William Frederick, Margrave of Brandenburg-Ansbach 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 and without legitimate issue. He married his first cousin, Christiane Charlotte of Württemberg-Winnental. He died
Principality of Ansbach and childless, and Frederick William was his kinsman as the head of the House of Hohenzollern. The Margrave moved to England with his English second wife. Ansbach was formally annexed on 28 January 1792. Principality of Ansbach The Principality or Margraviate of (Brandenburg-)Ansbach ( or ) was a principality in the Holy Roman Empire centered on the Franconian city of Ansbach. The ruling Hohenzollern princes of the land were known as margraves, as the principality was a margraviate (but not a march). The principality was established at the death of Frederick V, Burgrave of Nuremberg, on 21 January 1398, when