Fergus mac Echdach
He succeeded Áed Find. He is stated to have been a son of Eochaid mac Echdach, and thus a brother of Áed. Some much later sources make him a son of Áed, but this is not credited by modern studies. His death is noticed in 781 by the Annals of Ulster.
The next reported king of Dál Riata is Donncoirce.
- Anderson, Alan Orr, Early Sources of Scottish History A.D 500–1286, volume 1. Reprinted with corrections. Paul Watkins, Stamford, 1990. ISBN 1-871615-03-8
- Broun, Dauvit, The Irish Identity of the Kingdom of the Scots in the Twelfth and Thirteenth Centuries. Boydell, Woodbridge, 1999. ISBN 0-85115-375-5
- Broun, Dauvit, "Pictish Kings 761–839: Integration with Dál Riata or Separate Development" in Sally M. Foster (ed.), The St Andrews Sarcophagus: A Pictish masterpiece and its international connections. Four Courts, Dublin, 1998. ISBN 1-85182-414-6
- CELT: Corpus of Electronic Texts at University College Cork includes the Annals of Ulster, Tigernach, the Four Masters and Innisfallen, the Chronicon Scotorum, the Lebor Bretnach (which includes the Duan Albanach), Genealogies, and various Saints' Lives. Most are translated into English, or translations are in progress
| King of Dál Riata
- Broun, Dauvit (1999). The Irish identity of the kingdom of the Scots in the twelfth and thirteenth centuries. Studies in Celtic history. Woodbridge, Suffolk Rochester, NY: The Boydell Press. ISBN 0851153755.