Israel Regardie (1907 - 1985)
Born Israel Regudy to Jewish immigrants in London, Regardie moved to America with his family in 1921 at the age of 13. He developed an interest in occult matters early on and joined Societas Rosicruciana in America in 1926. After reading a copy of Book Four by Aleister Crowley, Regardie started a correspondence with Crowley, later becoming his secretary. He became a prolific writer, author of several books on the Golden Dawn and a hugely influential figure in modern occultism.