From; "The Fermanagh Story" , by Peadar Livingstone, the copy that you sold to me. Page 24 Donall Mor invaded Fermanagh in 1231 and was joined by the King of Fermanagh, Aonghus Mac Giolla Fhinnein. The Mac Giolla Fhinnein were 'taoisigh' of Muintir Pheodachain down till 1452. The peculiar thing is that their genealogy goes back to Cineal Conaill. This would suggest that they hailed from Donegal and that they were planted in Fermanagh as satellites of O'Donnell.