Count Alan III of Brittany was a nobleman who ruled during the 11th century. He was a member of the House of Rennes and played a significant role in the political landscape of Brittany, a region in northwestern France. His reign is noted for the consolidation of power and the strengthening of the Breton identity. Alan III was also known for his connections to the Normans and the Plantagenets, which influenced the dynamics of feudal relationships in the region. His leadership contributed to the development of Brittany as a distinct entity within the broader context of medieval France.