William Roy (1911-1977) was the pseudonym of William George Holroyd Plowright, a notorious fraudulent medium in the history of British spiritualism.[1][2]
^Larsen, Egon. (1966). The Deceivers: Lives of the Great Impostors. John Baker Publishers Ltd. pp. 134-142
^William Roy. Encyclopedia of Occultism and Parapsychology.