the battle of Fochart in Magh Muirthemne, which saw the king of Ulaid, Áed Róin, decapitated. As a result, the Cenél nEógain brought Conaille Muirthemne under their suzerainty. The last recorded king of Conaille Muirthemhne died in 1081, yet in 1107 Fergus, son of the King of Conaille, was killed in battle by the Uí Breasil Macha", so it seems the kingdom still retained independence. However, the Airgíalla seem to have brought it under their control sometime after this, most probably c. 1130 by Donnchad Ua Cerbaill, king of Airgialla, and it was incorporated into his kingdom. He settled elements of the Uí Méith, an Airgialla tribe, on the Conaille of Cuailgne, on the south side of Carlingford Lough which gave their name to the district of Omeath. In 1153 when High King Domhnall Mac Lochlainn " ... plundered ... and burned Conaille." Eoin MacNeill held the Conaille Muirtheimne to be kin of Ulaid and Érainn, descending from Conall Anglonnach, a son of Dedu mac Sin (MacNeill, pp. 97–8). Their association with the Cruthin appears to be the end result of a series of later inventions. Possible surnames derived from this group include Connolly. Geographical description of the kingdom This description of Conaille Muirtheimne is taken from the article cited below: "Until it fell under the control of the O'Carrols in the twelfth century, what is now County Louth was divided between three minor kingdoms. In the south lay that of Fir Arda Ciannacht (whence Ferrard); ... In the east and centre of the present county was the Airgiallan kingdom of Fir Roise, and in the north was that of the Conaille Muirtheimne ... The territory of Conaille Muirtheimne was associated with Mag Muirtheimne, 'the Plain of Muirtheimne' ...the core area of the kingdom appears to have been roughly equivalent to the barony of Dundalk Upper plus the parish of Dromiskin. The regions to the south-west (Louth) and north-east (Cuailgne), i.e., Cooley, were of uncertain or perhaps fluctuating status." Kings of Conaille Muirtheimne 688–1107 See Uarcraide mac Dícuill mac Osseni, d. 688, ally of Congalach, king of Brega and Dub dá Inber, king of Ard Ciannachta, killed at the battle of Imlech Pich. Amalgaid mac Cathasaig, d. 741, Fagall (Fallach) Finn mac Oengusa, d. 743 Foidmenn mac Fallaig/Fallomain, d. 752 Uargal (Uargalach mac Uachtbrain mac Uarcraide), grandson of Uarcraide, d. 765 Sluagadach mac Uargalaig, fourth son of Uargal, d. 789