Eochaid Muinremuir
Eochaid Muinremuir was a possible king of Dál Riata in the early 5th century. He was the grandfather of the legendary king of Scotland, Fergus Mór, he also was the father of Erc of Dál Riata. Eochaid may have married Carthn Casduff, but, as with most information about Eochaid, this fact is obscure and uncertain. Eochaid was also thought to be the son of Áengus Fert. He may be identified with the mythical Scots ruler Eugenius I. See also
Dalriada
Irish nobility
Fergus Mór

References 

Sources
  History of the Kings of Scotland, 1582, George Buchanan
 Genealogy, 2015, Bridget Windstead

Kings of Dál Riata
5th-century monarchs in Europe