[[Ríthe Dhál Riada|Rí Dhál Riada]] in iarthar na [[Albain|hAlban]] ba ea ''' Eochaidh mac Eochach ''' ([[Meán-Ghaeilge]] '''Eochaid mac Echdach''') ón mbliain 726 go dtí 733. [[Eochaid mac Domangairt|Eochaidh mac Domhanghairt]] ba ea a athair.
''Is Eochaiddócha camegur totháinig powerEochaidhi bygcoróin presumablytar deposingéis dó [[Dúngal mac Selbaig|Dúnghal mac Sealbaigh]] a chur as. B'fhéidir é go ndearna [[Selbach mac Ferchair|Sealbhach]] mayiarracht havea triedmac toa restorechur hisar sonais toach power,is andléir foughtnár againstéirigh Eochaid'sleis. supportersatBhí Cath eatarthu ag ''Irros Foichnae'' sa bhliain 727, but without apparent success.
''Níltear Thear annálaaon varyghuth assna toannála whetherar theseoladh despatchcabhlach ofgo ahÉirinn fleetchun fromcabhrú Dál Riada to [[Éirinn]] to aidle [[Flaithbertach mac Loingsig|Flaithbheartach mac Loingsigh]] in his war withéadan [[Áed Allán|Aodh Allán]] shouldle belinn placedréimeas inEochach thenó reign of Eochaidh, or that of hisa successorchomharba.
''Ina Atthásc hissa death inbhliain 733, '' Eochaidh is named king rather than lord of Dál Riada, which may suggest that after the defeat of Dúngal and Selbach his reign was unchallenged. His son, [[Áed Find|Aodh Fionn]], was later king of Dál Riada.
'' As Dál Riada certainly maintained a separate existence until 736, Eochaidh must have had a successor, or successors. It appears that he was succeeded by [[Muiredach mac Ainbcellaig|Muireadhach mac Ainfhaichilligh]], who had replaced Dúngal mac Selbaig as king of the [[Cenél Loairn|Chineál Loairn]].
