Note 5 — Chapter XXIII
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Long afterwards, at the time that Ireland was divided into five provinces, the Cruithnigh, or Picts, drove the Firbolg out of the islands again, and they were forced to come back to Cairbré Niafer, king of Leinster, who allotted them a territory, but placed such a rack-rent upon them that they were glad to fly into Connacht, where Oilioll and Mève—the king and queen who made the Táin Bo Chuailgne—gave them a free grant of land, and there Duald Mac Firbis, over two hundred and fifty years ago, found their descendants in plenty. According to some accounts, they were never driven wholly out of Connacht, and if they are a real race—as, despite their connection with the obviously mythical Tuatha De Danann, they appear to be—they probably still form the basis of population there. Máine Mór, the ancestor of the O'Kellys, is said to have wrested from them the territory of Ui Máiné (part of Roscommon and Galway) in the sixth century. Their name and that of their fellow tribe, the Fir Domnan, appear to be the same as the Belgæ, and the Damnonii of Gaul and Britain, who are said to have given its name to Devonshire. Despite their close connection in the Book of Invasions and early history of Ireland, the Firbolg stand on a completely different footing from the De Danann tribes. Their history is recorded consecutively from that day to this; many families trace their pedigree to them, and they never wholly disappeared. No family traces its connection to the De Danann people; they wholly disappear, and are in later times regarded as gods, or demons, or fairies.