"John Augustus, Prince of Anhalt-Zerbst (29 July 1677 in Zerbst – 7 November 1742 in Zerbst), was a German prince of the House of Ascania and ...
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ruler of the principality of Anhalt-Zerbst.
He was the eldest son of Karl William, Prince of Anhalt-Zerbst, by his wife Sophie, daughter of August, Duke of Saxe-Weissenfels." - (en.wikipedia.org 10.08.2021)