 Hogan, and Book of Fenagh, say their name derives from a branch of Conmaicne Rein, of the race of Luachan, son of Onchu, 4th in descent from Cumscrah.Cenel Luach is sometimes corrupted "Kinel-Luachain".Centered in Oughteragh parish, barony of Carrigallen, southern county Leitrim, their territory was bounded by native Irish forests on all sides, Sliabh an Iarainn west and north, Tullyhaw north east, and Conmaiche of Maigh Rein to the south.