Duke William III of Jülich was a nobleman who ruled in the late 15th and early 16th centuries. He was born in 1467 and became the Duke of Jülich, a region in present-day Germany, in 1511. His reign was marked by efforts to strengthen his territory and maintain its independence amid the political complexities of the Holy Roman Empire. William III was also known for his connections to other noble families, including the House of Cleves. His marriage to Maria of Cleves helped to solidify alliances, and he played a significant role in the regional politics of his time, navigating relationships with neighboring states and influential figures.