Asteria

In Greek mythology, Asteria or Asterie is a daughter of the Titans Phoebe and Coeus (Polus) and the sister of Leto. According to Hesiod, by the Titan Perses she had a single child, a daughter named Hecate, the goddess of witchcraft. Other authors made Asteria the mother of the fourth Heracles and Hecate by Zeus. (Wikipedia)