John of Islay, Earl of Ross – Wikipedia

John of Islay (or John MacDonald) (1434–1503), Earl of Ross, fourth (and last) Lord of the Isles, and Mac Domhnaill (chief of Clan Donald), was a pivotal figure in late medieval Scotland: specifically in the struggle for power with James Stewart, James III of Scotland, in the remoter formerly Norse-dominated regions of the kingdom.His defeat in this conflict led to rebellion against John by …

https://en.wikipedia.org/wiki/John_of_Islay,_Earl_of_Ross