From Greek Ειρηνη (Eirene), derived from a word meaning "peace". This was the name of the Greek goddess who personified peace, one of the 'Ωραι (Horai). It was also borne by several early Christian saints.
Selene is the Greek goddess of the moon, sister of Helios the sun god. Selene is also sometimes called Cynthia and Phoebe. The name may be related to the word selas, which means light.
