 In fact John is actually styled "Rí Innsi Gall" or King of the Isles shortly after his death in a contemporary entry in the Irish Annals of Ulster.John was the son of Aonghus Óg Mac Domhnaill, an Islay-based nobleman who had benefited from king Robert I of Scotland's attacks on the MacDougall ("Mac Dhùghaill") rulers of Argyll and their Comyn allies, and had been given Ardnamurchan, Lochaber, Duror and Glencoe, turning the MacDonalds from the Hebridean "poor relations" into the most powerful kindred of the north-western seaboard.The loyalty of Aonghas to Robert, however, did not mean that John's loyalty to Robert's son and successor David II would follow suit.