Clan Gunn history and Clan Gunn origin, again
As I have made clear many times there is no verifiable Clan Gunn history before Gunn crowner / Coroner of Caithness in the fifteenth century; Gunn 'history' before that time is generally best viewed as fiction (and that includes the Clan Gunn Chief Orkney islands origin myth) although I am inclined to accept Smibert's idea as to the origin of the Gunns, namely that the Gunns were some of the original inhabitants of Caithness / Sutherland / Strathnaver.
Further support for the above comes from Alex McBain (M.A. LL.D. Place Names of Highlands & Islands of Scotland published by Eneas Mackay of Stirling in 1922) who writes -
The Clan Gunn were of Caithness origin ... Their ancestor was Gun, crowner of Caithness, about the middle of the 15th century (1450). He was a man of great power in his day, and a descent from the King of Denmark was claimed for him... John Gunn Robson was leader of the Caithness Gunns in 1616 ... pages 21 / 22
I note MacBain's encouragement for -