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William III, Duke of Luxembourg
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William III (April 30 , 1425 – September 17 , 1482 ), called the Brave (in German Wilhelm der Tapfere ), was Landgrave of Thuringia (from 1445) and Duke of Luxemburg (from 1457).
He was a younger son of Frederick I the Warlike , elector of Saxony , and Catharine of Brunswick-Lüneburg . On June 2 , 1446 he married Anne of Luxembourg , daughter of Albert II, King of Germany, Bohemia and Hungary and Elisabeth of Luxembourg . On behalf of his wife, he became Duke of Luxembourg from 1457 to 1469. They had two daughters, Margarethe of Saxony (1449-1501) and Katharina of Saxony (1453 – 10 July 1534 ), who married to Duke Henry II of Münsterberg
William minted a silver groschen known as the Judenkopf Groschen . Its obverse portrait shows a man with a pointed beard wearing a Jewish hat , which the populace took as depicting a typical Jew .