Ahasuerus (āhăsˌyōēˈrəs) [key], Hebrew form of the name Xerxes, as used in the Bible. The Ahasuerus in the Book of Esther is probably Xerxes I. That in the Book of Tobit may be Cyaxares I, destroyer of Nineveh. The name of the father of Darius the Mede is also given as Ahasuerus.
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