Phoebe is the goddess of the moon, related to the nights of the full moon. Her name means "brilliant", a name that was borrowed from her grandson Apollo, also called Phoebus (although it was most often depicted with the first name).
Phoebe joined Coeus and had as goddesses Leto (mother of Artemis and Apollo) and Asteria (mother of Hecate), who respectively symbolize the oracles of light and darkness. Higino still adds the name of Afirafes among his daughters.
Phoebe was an ancient goddess of prophecy and the third to preside over the oracle at Delphi, after Gaia (her mother) and Themis (her sister). She later gave the oracle to her grandson Apollo as a birthday present.