Adolph II, Duke of Cleves, was a nobleman who ruled from 1521 until his death in 1547. He was part of the House of Cleves, a prominent family in the region of North Rhine-Westphalia, Germany. Adolph II is known for his efforts to strengthen his duchy and maintain its independence during a time of political turmoil in Europe. He was the son of John III, Duke of Cleves, and inherited the title after his father's death. Adolph II's reign was marked by his involvement in the Reformation, as he navigated the challenges posed by religious changes and conflicts in the Holy Roman Empire.