 Further intrigue by the Clan Campbell brought the downfall of the Clan Donald of Dunnyveg and by 1620 Sir James MacDonald had lost control of Islay and Kintyre.However, during the Civil War the lands were back in the hands of the MacDonalds briefly when they were supporters of James Graham, 1st Marquess of Montrose.A notable member of the Clan MacDonald of Dunnyveg is Alasdair Mac Colla who is famed for his victories with the Royalist James Graham, 1st Marquess of Montrose during Scottish Civil War of the 1640s.