the clan gunn--badge:Aitionn (Juniper) or Lus nan laoch (Roseroot).

This clan is of Norse origin. The Guns were a warlike clan of Caithness and Sutherland; the name is derived from the Norse word gunnr---war.
The Gunns and the Keiths were for ever at enmity. Lachlan Gunn of Braemor had an only daughter, Helen, who ws famous for her beauty, and the day of her marriage with her cousin Alexander was fixed; but Dugald Keith, a retainer of Keith of Ackergill, whose advances she had repelled, surrounded her father's house with a body of armed Keiths, slew many of the Gunns, who were unprepared for the attack, adn carried off the girl to Ackergill, where she became the victim of her abductor, and eventually threw herself from the summit of the tower.
Raid upon raid ensued now, and during one of these, in 1426, a desperate battle was fought between the two clans at Harpsdale, eight miles from Thurso. The conflict was rancorous and bloody, but indecisive.
About the middle of the fifteenth century the Chief of the clan was George, who lived with barbaric pomp in his castle of Clyth. From the office he held he was known as Crouner Gunn, but by the natives as "Am Brdisteach Mor," from a large silver brooch which fastened his plaid. Weary of the feud, he and the Chief of the Keiths agreed to meet with twelve horsemen a-side at the Chapel of St. Tears and settle it amicably. This was in 1464. The Keiths came with twenty-four men--two on each horse--and attacked the Gunns; the latter fought desperately, and were cut to pieces. George Gunn was slain and stripped of his arms, armour and brooch. Soon after William MacKames, a kinsman of the Gunns, killed George of Ackergill and his son, with ten men, at Drummay.
The patronymic of Gunn of Kilearnan is Mac-Sheumais-Chataich.
The chiefship is considered to belong to the family of Gunn of Rhives, who are descended from a son of the fifth Chief.

"The Scottish Clans & Their Tartans"--W.&A.K. Johnston. Ltd, Edinburgh.