13The Tuatha Dé Danaan ("People of the Goddess Danu") were thought to be a god-like race who ruled Ireland before the coming of the Milesians (Celts). After the Tuatha Dé Danaan were defeated in battle they retreated underground, and were thought to live in "fairy fort" mounds such as Newgrange.
"Aengus Óg" is also spelled "Óengus," or "Aonghus."