Diana is a goddess in Roman and Hellenistic religion, primarily considered a patroness of the countryside, hunters, crossroads, and the Moon. She is equated with the Greek goddess Artemis, and absorbed much of Artemis' mythology early in Roman history, including a birth on the island of Delos to parents Jupiter and Latona, and a twin brother, Apollo, though she had an independent origin in Italy.
Diana is considered a virgin goddess and protector of childbirth. Historically, Diana made up a triad with two other Roman deities: Egeria the water nymph, her servant and assistant midwife; and Virbius, the woodland god.
Diana is revered in modern neopagan religions including Roman neopaganism, Stregheria, and Wicca. In the ancient, medieval, and modern periods, Diana has been considered a triple deity, merged with a goddess of the moon (Luna/Selene) and the underworld (usually Hecate).
The name Dīāna probably derives from Latin dīus ('godly'), ultimately from Proto-Italic *dīwī, meaning 'divine, heavenly'. It stems from Proto-Indo-European *diwyós ('divine, heavenly'), formed with the stem *dyew- ('daylight sky') attached the thematic suffix -yós. Cognates appear in Myceanean Greek di-wi-ja, in Ancient Greek dîos (δῖος; 'belonging to heaven, godlike'), and in Sanskrit divyá ('heavenly' or 'celestial').
The ancient Latin writers Varro and Cicero considered the etymology of Dīāna as allied to that of dies and connected to the shine of the Moon, noting that one of her titles is Diana Lucifera ("light-bearer").
people regard Diana and the moon as one and the same. ... the moon (luna) is so called from the verb to shine (lucere). Lucina is identified with it, which is why in our country they invoke Juno Lucina in childbirth, just as the Greeks call on Diana the Light-bearer. Diana also has the name Omnivaga ("wandering everywhere"), not because of her hunting but because she is numbered as one of the seven planets; her name Diana derives from the fact that she turns darkness into daylight (dies).