theocrat (n.)

1827, "a ruler in the name of God," from Greek theos "god" (from PIE root *dhes-, forming words for religious concepts) + -crat, from aristocrat, etc. From 1843 as "one who favors a system of theocracy." Theocratist was the name of a publication begun in 1828 "to maintain the essential relation which subsists between religion and politics," and might be used in the sense "one who emphasizes divine authority over reason and individual freedom and who explains social order as a revelation from God."