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. Wikipedia
Born: April 30, 1425, Meissen, Germany
Died: September 17, 1482 (age 57 years), Weimar, Germany
Children: Margaret of Thuringia and Katharina of Thuringia
Grandchildren: Albert of Brandenburg, Joachim I Nestor, Elector of Brandenburg, Anna of Brandenburg, and more
Great grandchildren: Christian III of Denmark, Joachim II Hector, Elisabeth of Brandenburg, Duchess of Brunswick-Calenberg-Göttingen, and more