Constant Chevillon (born 26 October 1880 in Annoire (Jura); died 25 March 1944 in Lyon) was a French occultist who was Grand Master of the Freemasonry Rite of Memphis-Misraïm and head of FUDOFSI and other occult societies.
At an early age, his prodigious memory and learning genius made their debut and the priest decided to teach him Latin.
He knew Socrates' Precepts of Self-knowledge, but the one that guided his life was: "Renounce thyself while serving others".
He was enthroned as Patriarch of the Eglise Gnostique Universelle after Jean Bricaud, and succeeded by one of his students, René Chambellant, who maintained the compendium of esoteric societies in cooperation with the Gnostic church.
During World War II, he was shot and killed by the militia (French police submitted to the Gestapo) in a brutal hostage murder on 23 March 1944 in Lyon.