Malcolm IV, 1141–65, king of Scotland (1153–65), grandson and successor of David I. On his accession the young king was at once faced with a rebellion of the western Gaels, supported by the Norse, which he put down. Henry II of England insisted he give up his claim to Northumbria in 1157 in return for a re-grant of the earldom of Huntingdon, which was largely useless to the Scottish kings because of its distance from Scotland. Malcolm fought on Henry's behalf in France (1159) and, on his return, completed the subjection of Galloway. He was succeeded by his brother William the Lion.
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