sentences:  In fact, the albeit exaggerated title "King of Argyll" accorded to the slain Clann Domhnaill dynast in many of these annal-entries exemplifies the catastrophic effect that the rise of the Bruce regime had on its opponents like Clann Dubhghaill.By the mid-part of the century, Clann Domhnaill, under the leadership of Aonghus Óg's succeeding son, was undoubtedly the most powerful branch of Clann Somhairle.Aonghus Óg seems to have died at some point after the Battle of Bannockburn—notwithstanding the Hebridean tradition preserved by the eighteenth-century "Book of Clanranald" and the "Sleat History" that dates his death to about 1300.