Tuatha De DanaanTu·a·tha Dé Da·naan
The pre-Christian gods who invaded and inhabited Ireland, sometimes represented as heroes or fairies. They were defeated by the Milesians and driven underground.
Origin of Tuatha De DanaanMiddle Irish Túatha Dé Danann (traditionally interpreted as meaning “Tribes of the goddess Danu” ), from Old Irish Túatha Dé Donann : tuatha, pl. of túath, people, tribe + dé : genitive of día, god, goddess + Donann, of unknown origin.