c. 1200, ancient Italian goddess of the moon, patroness of virginity and hunting, later identified with Greek Artemis, and through her with eastern goddesses such as Diana of Ephesus. From Late Latin Diana, on Old Latin Jana. The name is explained as *Diwjana, from *diw-yo-, from PIE root *dyeu- "to shine," in derivatives "sky, heaven, god," in reference to the shining moon, or from dius "godly."