Tuatha Dé Danann the 'People of the Goddess Danu were a race of divine beings, said to have inhabited Ireland before the occupation of the Gaels or Celts. The Tuatha Dé were skilled in magic and in druid lore. After the coming of the Gaels, the Tuatha Dé were driven underground, to establish an otherworld kingdom beneath the hills Tir Na Nog the land of the forever young.