William Frederick, Margrave of Brandenburg-Ansbach (8 January 1686^[1] – 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.

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Quick Facts Born, Died ...

William Frederick
Margrave of Brandenburg-Ansbach
Born	(1686-01-08)8 January 1686 Ansbach
Died	7 January 1723(1723-01-07) (aged 36) Unterreichenbach
Noble family	Hohenzollern
Spouse(s)	Christiane Charlotte of Württemberg-Winnental
Issue	Karl Wilhelm Friedrich, Margrave of Brandenburg-Ansbach Margravine Eleonore Margrave Frederick Charles
Father	John Frederick, Margrave of Brandenburg-Ansbach
Mother	Princess Eleonore Erdmuthe of Saxe-Eisenach

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William Frederick was born in Ansbach in 1686 to John Frederick, Margrave of Brandenburg-Ansbach, and his father's 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 in 1709.^[2][3] He died in Unterreichenbach and was succeeded by his son Charles William Frederick, called "The Wild Margrave".^[4]