Ceawlin Henry Laszlo Thynn, 8th Marquess of Bath (/ˈsuːəlɪn/; SOO-ə-lin; born 6 June 1974), styled Viscount Weymouth between 1992 and 2020, is a British businessman and the first son and second child of Alexander Thynn, 7th Marquess of Bath, and his wife Anna Gyarmathy. He is active in a number of companies in the leisure, tourism, real estate, and financial services sectors.