Eileithyia or Ilithyia was the Greek goddess of childbirth and midwifery, and the daughter of Zeus and Hera. In the cave of Amnisos (Crete) she was related with the annual birth of the divine child, and her cult is connected with Enesidaon, who was the chthonic aspect of the god Poseidon. It is possible that her cult is related with the cult of Eleusis. In his Seventh Nemean Ode, Pindar refers to her as the maid to or seated beside the Moirai (Fates) and responsible for the creation of offspring. Her son was Sosipolis, who was worshiped at Elis.

Zeus is the sky and thunder god in ancient Greek religion and mythology, who rules as king of the gods on Mount Olympus. His name is cognate with the first syllable of his Roman equivalent Jupiter.