The Tuatha De Danann were known to come from the heavens, but that may be from scribes not knowing how to execute their origin. So the scribes borrowed from past religions like the Greek, Roman and Eastern myth to create an origin story. The Gauls were thought to come from underneath the Earth. This information had been passed down from druids from Dispater, the God of the underworld. Earth was thought to be a woman at the time, so this was thought to be a metaphorical birth, not ascending from hell. The Earth, moon and sun were thought to be created by druids, much like how Brahmans boasted the same cosmogony story. Much like preceding myth, the Gauls believed the trees and mountains held up the sky.