 Domnall mac Murchada ( died 1075 ) , also known as Domnall mac Murchada meic Diarmata , was a leading late eleventh @-@ century claimant to the Kingdom of Leinster , and a King of Dublin . As a son of Murchad mac Diarmata , King of Dublin and the Isles , Domnall was a grandson of Diarmait mac <unk> na mBó , King of Leinster , and thus a member of the Uí Chennselaig . Domnall was also the first of the <unk> Murchada , a branch of the Uí Chennselaig named after his father . 
