 The clan is known in Gaelic as "Clann Ùisdein" ("children of Ùisdein"), and its chief's Gaelic designation is "Mac Ùisdein" ("son of Ùisdean"), in reference to the clan's founder.Both the clan and its clan chief are recognised by the Lord Lyon King of Arms, who is the heraldic authority in Scotland.The Macdonalds of Sleat participated in several feuds with neighbouring clans, most notably the Macleods of Harris & Dunvegan and the Macleans of Duart.