This appears to be the work of Fergalin in conjunction with Murchad Midi (died 715) the King of Uisnech of Clann Cholmáin and Murchad may have been Fergal's deputy ruler in the south.
In 711 Fergal mac Máele Dúin fought the Battle of Sliab Fuait (in the Fews, modern County Armagh) where the king of Uí Méith, Tnúthach son of Mochloinges, and Cú Raí mac Áedo of the Fir Cúl sept of the Síl nÁedo Sláine of Brega were slain.