However Áed was killed that same year by his nephew, Matudán mac Muiredaig (died 857) who became King of Ulaid.
Matudán was succeeded by a member of the rival Dal nAraide sept, Lethlobar mac Loingsig (died 873).
[3] Ainbíth became king in 873 upon the death of the aged Lethlobar and the annals record that he waged war with his neighbors.
[4] In 882 the Ualid fought a skirmish with the Conaille Muirtheimne (located in Dundalk area of County Louth).
Ainbíth was slain along with his ally Conallán mac Máele Dúin, king of Coba (the Uí Echach Cobo of west County Down).