 Even before Diarmait 's demise , the Uí Chennselaig began to fight amongst themselves in a struggle that was almost certainly an after @-@ effect of Diarmait 's sons ' untimely deaths . Specifically , the Annals of the Four Masters , and the Annals of Inisfallen reveal that Domnall battled against the forces of his own first cousin once removed , Donnchad mac Domnaill Remair ( died 1089 ) , before Diarmait 's ally , Toirdelbach Ua Briain , King of Munster ( died 1086 ) , was able to intervene and restore order in the Kingdom of Leinster . 
 Even before Diarmait <a href='null_genetive' title='1'><mark>'s</mark></a>demise , the Uí Chennselaig began to fight amongst themselves in a struggle <a href='null_relcl' title='2'><mark>that</mark></a>was almost certainly an after @-@ effect of Diarmait <a href='null_genetive' title='3'><mark>'s</mark></a>sons <a href='null_genetive' title='4'><mark>'</mark></a>untimely deaths . Specifically , the Annals of the Four Masters , and the Annals of Inisfallen reveal that Domnall battled against the forces of his own first cousin once removed , Donnchad mac Domnaill Remair (<a href='been_done' title='5'><mark></mark></a> died 1089 ) , before Diarmait <a href='null_genetive' title='6'><mark>'s</mark></a>ally , Toirdelbach Ua Briain , King of Munster (<a href='been_done' title='7'><mark></mark></a> died 1086 ) , was able to intervene and restore order in the Kingdom of Leinster . 
Even before Diarmait  demise , da Uí Chennselaig began to fight amongst themselves in a struggle was almost certainly an after @-@ effect of Diarmait  sons  untimely deaths . Specifically , tdaAnnals of thda Masters , and the Annals of Inisfallen reveal that Domnall battled against the forces of his own first cousin once removed , Donnchad mac Domnaill Remair ( done died 1089 ) , before Diarmait  ally , Toirdelbach Ua Briain , King of Munster ( done died 1086 ) , was able to intervene and restore order in the Kingdom of Leinster .