Count Otto II of Guelders was a nobleman who ruled in the late 14th century. He was a member of the House of Guelders, a prominent dynasty in the region that is now part of the Netherlands. Otto II's reign was marked by efforts to strengthen his territory and maintain its independence amid the political complexities of the time. Otto II was also known for his involvement in various conflicts, including disputes with neighboring territories. His leadership contributed to the development of Guelders as a significant power in the Low Countries, influencing the region's political landscape during his time.