Adolph II, Duke of Guelders, was a nobleman who ruled from 1423 until his death in 1448. He was a member of the House of Wittelsbach and played a significant role in the politics of the Low Countries. His reign was marked by efforts to strengthen the duchy and maintain its independence amid the power struggles of neighboring territories. During his rule, Adolph II faced challenges from rival factions and sought alliances to secure his position. He was known for his military engagements and attempts to expand his influence. His legacy includes contributions to the cultural and political landscape of Guelders during the late medieval period.