Duke Conan IV of Brittany, also known as Conan IV, was a prominent nobleman in the 12th century. He was born around 1130 and became Duke of Brittany in 1171 after the death of his father, Duke Conan III. His reign was marked by efforts to strengthen the duchy's independence and manage conflicts with neighboring territories. Conan IV was married to Margaret of Scotland, which helped to solidify alliances with the Scottish crown. His rule faced challenges, including disputes with the English crown and internal strife. He died in 1171, leaving a legacy that influenced the future of Brittany.