Duke Conan III of Brittany was a prominent nobleman who ruled from 1113 to 1148. He was the son of Duke Alan IV and Hawise of Brittany, and he played a significant role in the political landscape of medieval Brittany. His reign was marked by efforts to strengthen the duchy and maintain its independence from external influences, particularly from the Kingdom of England and the Kingdom of France. Conan III is also known for his marriage to Margaret of Scotland, which helped to solidify alliances between Brittany and Scotland. He had several children, including Duke Hoel, who succeeded him. His legacy includes contributions to the cultural and political development of Brittany during a tumultuous period in European history.