Samuel Liddell MacGregor Mathers
Samuel Liddell (or Liddel) "MacGregor" Mathers, born as Samuel Liddell (January, 1854 - November, 1918), was a famous magician and one of the most influential figures in modern Occultism. He is primarily known as one of the founders of the Hermetic Order of the Golden Dawn, a ceremonial magic order whose offshoots still exist today.