Gregory Hill (21 May 1941 – 20 July 2000), better known by the pen name Malaclypse the Younger, was one of the two writers of the Principia Discordia, along with Kerry Wendell Thornley (a.k.a. Lord Omar Khayyam Ravenhurst). He was also adapted as a character in The Illuminatus! Trilogy. During the early years of circulation of the Principia Discordia, rumors claimed that the author of the book was Richard Nixon, Timothy Leary, or Robert Anton Wilson; or that the book and Malaclypse the Younger were both fictional inventions of Robert Anton Wilson, as with Abdul Alhazred's Necronomicon.