The accompanying text in 'The Clans of the Scottish Highlands' by James Logan begins as follows: "MAC DHUBHICH, OR MAC DUFFS This surname is one of the most ancient in Scotland, and the chief was among the first of those nobles who became distinguished by the Saxon title of Earl. Dubh, the bh having the sound of f or v, is the term in Gaëlic descriptive of a black or dark coloured man, and all those who are of this clan refer to MacDuff, the powerful Thane of Fife, who overthrew MacBeth in 1056, as their common ancestor; but the first Thane was created anno 838. Several other tribes in different parts, who have long been distinguished and independent clans, are also sprung from these great Celtic dignitaries, as the family of MacIntosh and the noble house of Weems, who took the name from Eoin mòr na-h-Uamh, great John of the Cave, who flourished 1140."
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