The MacDougall clan were the descendants of Dugald, son of Somerled, who ruled Lorne and Mull in Argyll in the 13th and early 14th centuries.

They were supporters of King John and were driven out by supporters of Robert Bruce during the civil wars in Scotland which formed part of the Wars of Independence.

The MacDougall lords included:

• Dugald, son of Somerled
• Dugald Screech and Donnchad of Argyll (died 1237x1248) (and perhaps Uspak), sons of Dugald
• Eoghan of Argyll, son of Duncan (died 1268x1275)
• Alexander of Argyll, son of Eoghan (died 1310x1311, perhaps at Carlisle), married a daughter of John Comyn, driven from Scotland by Robert Bruce and his allies; his sister Mary married Magnus Olafsson, King of the Isle of Man and, on Magnus's death, remarried with Maol Íosa, Mormaer of Strathearn
• John of Lorne, son of Alexander (died on pilgrimage to Canterbury, September 1317), enemy of Bruce and Bruce's ally Angus Óg of Islay, defeated and driven into exile