Echthighern mac Cennétig
The historian Geoffrey Keating states that during the twelve-year period that Mathgamain held the sovereignty of Munster , "Echthighearn , son of Cinneide , was chief of Thomond . " Donnchuan mac Cenniedi and his brother Echthigern were slain in the year 950 when Congalach Cnogba , King of Ireland , invaded the province of Munster . 
<triplet> Congalach Cnogba <subj> King of Ireland <obj> position held