Gaia or "land" or "earth" was the goddess or personification of Earth in ancient Greek religion, one of the Greek primordial deities. Gaia was the great mother of all: the primal Greek Mother Goddess; creator and giver of birth to the Earth and the entire Universe.
The heavenly gods the Titans and the Giants were born from her union with Uranus (the sky), while the sea-gods were born from her union with Pontus (the sea). Her equivalent in the Roman pantheon was Terra.