Danu is the most ancient of the Celtic gods. She was a mother goddess. In this guise she represented the Earth and its fruitfulness. Rivers are associated with her, and represent the fertility and abundance in a land. It is suggested Danu had dual characteristics, one being the beneficent, nurturing mother goddess, and another being the strong, malevolent side of the warrior goddess. The root “dan” in ancient Irish means art, skill, poetry, knowledge, and wisdom.