 Sir Ralph Cochrane the youngest son of Thomas Cochrane, 1st Baron Cochrane of Cults, was a British pilot and Royal Air Force officer, perhaps best known for his role in Operation Chastise–the famous "Dambusters" raid.The chief of the Name and Arms of Cochrane is Iain Alexander Douglas Blair Cochrane, 15th Earl of Dundonald, 10th Baron Cochrane of Dundonald as well as 10th Baron of Paisley and Ochiltree.He is also the 5th Marquess of Maranhão in Brazil.