The Cinel Fathaidh, i.e. the race of Fathadh. Cormac, the last of this tribe mentioned in the pedigree, was the thirteenth in descent from Maine Mor (the common ancestor of the Hy-Many race), and must have been, therefore, contemporary with Oilioll Mac Inrachtach, who died chief of Hy-Many in the year 794, and who was the same number of generations from the same Maine. It must not be supposed that hereditary surnames were in use at this time, nor is it even certain, though it may be possible, that the tribe here called Cinel-Fathaidh, were the people whose descendants, after the tenth-century, took the hereditary surname of O'Fathaidh. The family of O'Fahy, whether they be of this tribe or not, are still very numerous in the southern part of Hy-Many; the name now is generally anglicised Fahy, without the O'; but in one instance the O'Fahy is retained, and the remainder shortened to Fay. This, however, is not to be recommended, nor is the vile practice of translating the name to Green, from its resemblance to the Irish word Faithche, a green or field, to be applauded. It appears from the inquisitions taken in the reign of James I., that several branches of the family had then some fee simple property in the barony of Loughrea. An inquisition taken at Loughrea, on the 16th of September, in the year 1617, before Sir Charles Coote, finds that Teige Antlevy, [i.e. of the mountain] O'Fahy is seised of fee of portions of Lishadoile, Kealuragh, and Cappaghard; that Teige O'Fahy and Edmond O'Fahy, his son, are seised of fee of a portion of the quarter of Knockanteige and Cappaghard; and that Edmond Uny O'Fahy, Edmond Oge mac Edmond O'Fahy, Richard Mac Edmond O'Fahy, and Teige Mac Edmond Oge O'Fahy, were seised of fee of portions of Kealuragh, Lishadoile, and Cappaghard; and that John Mac Uny O'Fahy was seised of fee of portions of the townlands of Lishadoile, Cahercranilly, Garryblaken, and Ballinrowan, all in the barony of Loughrea. There is a tradition in the barony of Loughrea, that the Earl of Clanrickard found it very difficult to get the O'Fahys to pay him tribute, their chief always telling the Earl that the lands he possessed were his own, and that the Earl had no claim on them.

From The Tribes and Customs of Hy-Many, commonly called O'Kelly's Country (Author: Unknown), p.34 (section .15) Corpus of Electronic Texts Edition
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