system
A chat on 4chan
human
All of this 'Yod-he-vau-he', 'Elohim', 'Adonay', 'Jehovah', 'Amen and '...in the name of the Father, Son, and 'Holy Spirit'' nonsense was the way 'xtians' could say that their magick was xtian, especially when it became prominent in the 19th and early 20th C. with the Golden Dawn and Spiritism, when Xtians wanted to get in on that day's fashionable Occultism without feeling too guilty, and believed that it offered some protection from what they were doing. But this stuff was the meat of Rennaissance High (ceremonial) magick as well, up until today.
gpt
It was basically just Christians, Muslims and Jews (aside from Pletho) who were the ones practicing western occultism from when the greek/Roman/Egyptian pagans died out in the early Middle Ages to the 19th century