Hoel II, Duke of Brittany was a nobleman who ruled in the late 10th century. He was part of the House of Rennes and succeeded his father, Hoel I, as duke. His reign is noted for its efforts to strengthen the duchy and maintain its independence from external influences, particularly from the Kingdom of France. During his rule, Hoel II faced challenges from neighboring territories and worked to consolidate power within Brittany. He is remembered for his contributions to the region's stability and governance, which laid the groundwork for future dukes in the Brittany region.