Phoebe is a Titan in Greek mythology. She was associated with the moon. She is the daugher of Uranos and Gaia. She was married to her brother Coeus, and had two daughters: Leto and Asteria. Leto bore Artemis and Apollo, Asteria is the mother of Hecate.
The Olympians beat the Titans in the ten-year war. She and the Titans were summoned by Zeus to Tarturus, in the Underworld.
Phoebe (Titan) Facts for Kids. Kiddle Encyclopedia.