John of Cleves
John of Cleves was a nobleman from the House of La Marck in the 15th century. He was born in 1417 and became the Duke of Cleves, a region in present-day Germany. John was known for his political alliances and efforts to strengthen his territory through marriage and diplomacy.
He is perhaps best remembered for his marriage to Mary of Guelders, which helped to solidify ties between their respective regions. John's reign was marked by his attempts to navigate the complex political landscape of the time, including relationships with neighboring states like Burgundy and Brandenburg.