Dealbhna.—There were seven tribes of this name seated in different parts of Ireland. They were of the Dalcassian race, and derived their patronymic name of Dealbhna, from their progenitor, Lughaidh Dealbh-aedh, the third son of Cas. The tribe alluded to in the text were generally called Dealbhna Nuadhat, and were seated in the present county of Roscommon, between the Rivers Suck and Shannon.—See O'Flaherty's Ogygia, Part III. c. 82, and Annals of the Four Masters, at the year 816.