William III, duke of Luxembourg (born 1425)

William III, Landgrave of Thuringia

Landgrave of Thuringia from the Wettin dynasty

William III, called the Brave, was landgrave of Thuringia and claimant duke of Luxemburg. He is actually the second William to rule Thuringia, and in Luxembourg; he was the third Margrave of Meissen named William.