Ravenclaw is the surname of a wizarding family that existed circa one thousand years ago in Britain. It is unknown if they were pure-blood, or if they had Muggle as well as magical heritage. It is also unknown if this family remains extant in either the male or female line, though the Ravenclaw name is well known, as Rowena Ravenclaw founded Ravenclaw house at Hogwarts School of Witchcraft and Wizardry.