The Morrigan in Celtic Mythology

The Milesians, who were mortals, invaded the lands of the Celts around 1500 B.C. and drove the Tuatha De Dannan underground. At this point the Celtic God Dagda, a Titanic figure in Irish mythology, assigned each member of the Tuatha De Dannan one of the mounds, or sidhe, establishing Otherworld kingdoms beneath the hills of the countryside, within

In the story of the Tuatha De Dannan, legend says that the Celtic Goddesses and Gods were the children of the Mother Goddess Danu and came down from the sky to Ireland in a cloud of mist on May Day morning.