What is "etteilla"

"Etteilla", the pseudonym of Jean-Baptiste Alliette (1738 – 12 December 1791), was the French occultist who was the first to popularise tarot divination to a wide audience (1785), and therefore the first professional tarot occultist known to history who made his living by card divination. Etteilla published his ideas of the correspondences between the tarot, astrology, and the four classical elements and four humors, and was the first to issue a revised tarot deck specifically designed for occult purposes (1791).