The three inscriptions bearing this eponym are found within a small area, the district of Dungarvan and Ardmore on the south coast. The eponym may be translated ‘Segomo's champion.’ Apart from this name, so far as I am aware, no trace of Segomo has been discovered in Irish tradition. He was known, on the other hand, to the Gauls as a war-god, ‘Mars Segomo.’ We should look for a tuath bearing some such name as *Dál Niath Segamon in the district mentioned, but no instance of such a name has been found. The name Segomo, however, and the locality are strongly suggestive of a late settlement of Gauls on the southern coast. The story of the Dési settlement ( Ériu 3., p. 139) names among the Dési allies Corco hUiniche do Gallaib, and Dál Maignenn, descendants of Maigniu Gall. We can only identify the descendants of Segomo's Champion with the Eoganachta, who claimed Nia Segamon as their ancestor. In Corcu Loegde, = Dáirine, we find another instance of a tuath owning two distinct eponyms. The occupation of Cashel by the Eoganachta cannot well be disconnected from the Dési settlement. (1) The whole territory east of the Suir and within the later Munster belonged traditionally to the Osseirge (Osraige), who were akin to the Lagin. (2) Airmuma, ‘East Munster’, is specifically the name of a territory west of the Suir, now the barony of Upper Ormond. Oenach Airmuman = Nenagh. (3) The baronies of Kilnemanagh Upper and Lower were held by Dál Coirpri, one of the cethri prímshloinnte Lagen, ‘the four chief denominations of the Lagin.’ (4) Cashel, according to the legend (Keating, Forus Feasa, book 1, sec. 3), was first ‘found’ in the time of Corc son of Luguid, and had not previously been a residence of the kings of Munster. Oengus, grandson of Corc, was king of Munster in St. Patrick's time, and Corc was said to have reigned in the time of Niall Noigiallach. The traditional occupation of Cashel then by the Eoganachta may be placed about A.D. 400. (5) As the seat of the Eoganacht dynasty, the place bore a name of Latin origin, caissel = castellum. For the tradition of its older names see Keating, l. c. The ITS edition of Foras Feasa ar Eirinn is available in electronic form at CELT.