William I of Guelders and Jülich
Counts and dukes of Guelders
William was Duke of Guelders, as William I, from 1377 and Duke of Jülich, as William III, from 1393. William was known for his military activities, participating in the Prussian crusade five times and battling with neighbors in France and Brabant... Wikipedia
Born: March 5, 1364
Died: February 16, 1402 (age 37 years), Arnhem, Netherlands
Great-grandparents: William I, Count of Hainaut, Reginald I of Guelders, Joan of Valois, Countess of Hainaut, and more
Grandchild: Sophia van Aller van Stoutenburch
Great grandchild: Hendrika van Varick
Parents: William II, Duke of Jülich and Maria, Duchess of Guelders
Spouse: Katherine of Bavaria (m. 1379–1400)