In medieval Irish myth, the Fir Bolg 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.
Ambassadors of the Fir Bolg and Tuath Dé meeting before the Battle of Moytura. An illustration by Stephen Reid in T. W. Rolleston's Myths & Legends of the Celtic Race, 1911
Nemed or Nimeth is a character in medieval Irish legend. According to the Lebor Gabála Érenn, he was the leader of the third group of people to settle in Ireland: the Muintir Nemid, Clann Nemid or "Nemedians". They arrived thirty years after the Muintir Partholóin, their predecessors, had died out. Nemed eventually dies of plague and his people are oppressed by the Fomorians. They rise up against the Fomorians, attacking their tower out at sea, but most are killed and the survivors leave Ireland. Their descendants become the Fir Bolg.
"Tuan watches Nemed", an illustration of Tuán watching the Nemedians arriving in Ireland, by J. C. Leyendecker in T. W. Rolleston's Myths & Legends of the Celtic Race, 1911
