By her son Pontus, Gaia bore the sea-deities Nereus, Thaumas, Phorcys, Ceto, and Eurybia. ink drawing on 9″×11″ sketchbook paper Gaia 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 all the 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. Oaths sworn in the name of Gaia, in ancient Greece, were considered the most binding of all.