Fir Bolg
In medieval Irish myth, the Fir Bolg (also spelt Firbolg and Fir Bholg) are the fourth group of people to settle in Ireland. They are descended from the Muintir Nemid, an earlier group who abandoned Ireland and went to different parts of Europe. Those who went to Greece became the Fir Bolg and eventually return to Ireland, after it had been uninhabited for many years. After ruling it for some time and dividing the island into provinces, they are overthrown by the invading Tuatha Dé Danann.