Kenneth I (Kenneth mac Alpin), d. 858, traditional founder of the kingdom of Scotland. He succeeded his father, Alpin, as king of Dalriada (the kingdom of the Gaelic Scots in W Scotland) and c.843 obtained the Pictish throne, thus establishing the nucleus of the kingdom of Scotland. Because of continual depredations by the Danes from the Irish coast, Kenneth moved his capital eastward to Scone.
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