United Duchies of Jülich-Cleves-Berg
William died in 1511, leaving his daughter the final member of the House of Jülich. He is buried in Altenberg Abbey. He was succeeded by his son-in-law, who inherited the Duchy of Cleves-Mark in 1521. John III then became the first ruler of the United Duchies of Jülich-Cleves-Berg, which would exist until 1666.