The name Gunn is thought to be Norse in origin, the clan claiming descent from Gunni, grandson of Sweyn Asleifsson, “the Ultimate Viking” and second son of Olaf the Black, Norse King of Man and the Isles who died in 1237.

Noted for their war-like and ferocious character, they were sworn enemies of the Keiths and in 1426 at Harpsdale, south of Thurso, a particularly bloody but indecisive battle took place, after which the Gunns settled mainly in Sutherland. George Gunn held the office of Coroner of Caithness, known as “Crowner Gunn”, he was one of the greatest men in the country at that time and lived in magnificent style in his castle at Clyth. He was killed through treachery in 1464 while trying to arrange a reconciliation with Clan Keith. His death was later avenged by his grandson who killed Keith of Ackergill, his son and twelve followers at Drummoy.