Dumnagual I of Alt Clut or simply Dumnagual Hen ("the Old") was the ruler of Alt Clut (modern Dumbarton Rock), probably sometime in the early sixth century. According to the Harleian genealogies, he was the son of a Cinuit, the son of King Ceretic of Alt Clut. He is known to have fathered several sons, including the future King Clinoch and Guipno, the father of the future king Neithon of Alt Clut. (5th century — 6th century — 7th century — other centuries) Events The first academy of the east the Academy of Gundeshapur founded in Persia by the Persian Shah Khosrau I. Irish colonists and invaders, the Scots, began migrating to Caledonia (later known as Scotland) Glendalough monastery, Wicklow Ireland founded by St. ...
References
MacQuarrie, Alan, "The Kings of Strathclyde", in A. Grant & K.Stringer (eds.) Medieval Scotland: Crown, Lordship and Community, Essays Presented to G.W.S. Barrow, (Edinburgh, 1993), pp. 1-19.