1670s, from Latinized form of Greek dēmiourgos, literally "public or skilled worker, worker for the people," from dēmos "common people" (see demotic) + ergos "work," from PIE root *werg- "to do."
The title of a magistrate in some Peloponnesian city-states and the Achæan League; taken in Platonic philosophy as a name for the maker of the world. In the Gnostic system, "conceived as a being subordinate to the Supreme Being, and sometimes as the author of evil" [OED]. Related: Demiurgic; demiurgical (c. 1600); demiurgeous.