 It is difficult to reconcile the inconsistencies presented about the origins of the MacTavishes, or that the MacTavishes are descended of the Campbells (having been considered a sept of Clan Campbell for generations), considering the Dunardry settlement date of approximately 893 A.D.The Inverary Castle Website, approved by the 13th Duke of Argyll has listed, "The Campbells arrived in Argyll as part of a royal expedition in c.1220.