Aidan was succeeded in the throne by his son Eocha-bui, or the “yellow,” who reigned sixteen years. He carried on war with the Cruithne of Ulster. After him came his brother Kenneth-Cear, or the “left-handed,” who was followed by Ferchar, son of Eogan, of the race of Lorn. Donal, surnamed _breac_ or freckled, the son of Eocha’-bui, of the race of Gauran, succeeded Ferchar about 637. He was a warlike prince and had distinguished himself in the wars against the Cruithne of Ireland. Congal-Claon, the son of Scanlan, the king of the Cruithne in Ulster, having slain Suibne-Mean, a powerful king of Ireland, was attacked by Domnal II., supreme king of Ireland, who succeeded Suibne, and was defeated in the battle of Duncetheren, in 629. Congal sought refuge in Cantyre, and having persuaded Donal-breac, the kinsman of Domnal, to join him in a war against the latter, they invaded Ireland with a heterogeneous mass of Scoto-Irish, Picts, Britons, and Saxons, commanded by Donal and his brothers. Cealach, the son of Maelcomh, the nephew of the reigning king, and as tanist or heir-apparent, the leader of his army, attacked Donal-breac in the plain of Magh Rath or Moyra in Down, in 637, and completely defeated him after an obstinate and bloody engagement. Congal, the murderer of his sovereign, met his merited fate, and Donal-breac was obliged to secure his own and his army’s safety by a speedy return to Cantyre. St. Columba had always endeavoured to preserve an amicable understanding between the Cruithne of Ulster and the Scoto-Irish, and his injunctions were, that they should live in constant peace; but Donal disregarded the wise advice of the saint, and paid dearly for so doing. He was not more successful in an enterprise against the Picts, having been defeated by them in the battle of Glinne Mairison, Glenmairison, or Glenmoreson, probably in West Lothian,[99] during the year 638. He ended his days at Straith-cairmaic or Strathcarron, possibly in the neighbourhood of Falkirk, by the sword of Hoan or Owen, one of the reguli of Strathcluyd, in the year 642. His son Cathasuidh fell by the same hand in 649. Conal II., the grandson of Conal I., who was also of the Fergusian race of Congal, next ruled over the tribes of Cantyre and Argyle; but Dungal, of the race of Lorn, having obtained the government of the tribe of Lorn, questioned the right of Conal. He did not, however, carry his pretensions far, for Conal died, in undisturbed possession of his dominions, in 652, after a reign of ten years. To Donal-duin, or the brown, son of Conal, who reigned thirteen years, succeeded Maolduin, his brother, in 665. The family feuds which had long existed between the Fergusian races of Comgal and Tauran, existed in their bitterest state during the reign of Maolduin. Domangart, the son of Donal-breac, was murdered in 672, and Conal, the son of Maolduin, was assassinated in 675.