 Whatever the circumstances of Domnall 's accession , the Uí Chennselaig regime in Dublin was short @-@ lived . The Annals of Inisfallen , the Annals of the Four Masters , and the Annals of Ulster , all reveal that , within the year , Domnall died after a brief illness , with the latter two sources <unk> that he succumbed after three nights of sickness . The Annals of Inisfallen and the Annals of Ulster accord him the title King of Dublin , and make no mention of any connection with the Leinster kingship . Upon Domnall 's demise , Toirdelbach had his own son , <unk> ( died 1119 ) , appointed King of Dublin . In so doing , Toirdelbach reinforced his authority in Dublin , and followed a precedent started by Domnall 's grandfather , in which a claimant to the high @-@ kingship of Ireland installed his own heir to the kingship of Dublin . 
