euhemerism (n.) Look up euhemerism at Dictionary.com
1846, "the method of regarding myths as glorified accounts of actual events or persons," from Euhemerus of Sicily (4c. B.C.E.), who wrote "Iera Anagraphe," in which he maintained the Greek deities actually were historical mortals. His name is literally "good day," from eu "well" (see eu-) + hemera "day" (see ephemera). Related: Euhemerist; euhemeristic.