Mary Williams (1883-1977) was a distinguished Welsh academic of modern languages. She was one of the first woman appointed to a professorial title at a British university. Known by her peers as a pioneer in the field of comparative medieval literature, more especially the origin and rise of the Arthurian Romances, she was awarded the Officier d’Academie and Chevalier de la Legion d’Honneur by the French government in 1934.