Kermac Macmaghan (fl. 1262–1264) was a thirteenth-century Scottish nobleman. In 1262, he is stated to have aided William I, Earl of Ross in a particularly vicious attack in the Hebrides. The assault itself is recorded by a thirteenth-century Scandinavian saga, and was likely conducted on behalf of Alexander III, King of Scotland, who wished to incorporate Isles into the Scottish realm. The following year, Hákon Hákonarson, King of Norway launched an expedition into the Isles to reassert Norwegian authority. The latter's campaign proved to be an utter failure, and after his departure and death the same year, the Scots forced the submission of the leading magnates of the Isles. In 1264, Kermac is recorded to have received compensation for services rendered. A fifteenth-century pedigree conce