He was created Baron Cochrane of Dundonald in 1647 .
William Cochrane of Coldoun , who was knighted by Charles I , acquired the estate of Dundonald in 1638 .
William Cochrane was created Baron Cochrane of Dundonald in 1647 .
William Cochrane of Coldoun , who was knighted by Charles I , acquired the estate of Dundonald in 1638 .