|File:Clan member crest badge - Clan Gunn.svg|
|Motto||Aut pax aut bellum (Either peace or war)|
|District||Sutherland and Caithness|
|Pipe music||The Gunn's Salute|
|Clan Gunn has no chief, and is an armigerous clan|
|Historic seat||Gunn's Castle (Clyth Castle)|
|Commander||Iain Alexander Gunn of Banniskirk|
Clan Gunn is a Scottish clan associated with northeastern Scotland, including Caithness and Sutherland and, arguably, the Orkney Islands. The Clan Gunn is one of the oldest Scottish Clans descended from the Norse Jarls of Orkney and the Pictish Mormaers of Caithness.
The traditional origin of the Clan Gunn is that the progenitor of the clan was one Gunni who came to Caithness at the end of the 12th century when his wife, Ragnhild, inherited the estates from her brother, Harald Maddadsson who was the Earl of Orkney. His wife descended from St Ragnvald, who was the founder of the St Magnus Cathedral in Kirkwall, Orkney. Gunni, whose name meant war, was allegedly descended from Viking adventurers and his grandfather was Sweyn who was killed in a raid on Dublin in 1171. Smibert however states that the Gunns were of Gaelic origin.
The first 'chief' of the Clan Gunn to appear in historical records definitively was George Gunn, who was the crouner or coroner of Caithness during the 15th century. The later Celtic patronymic of the Gunn chiefs may have been MacSheumais Chataich, however 'George' Gunn was widely known as Am Braisdeach Mor which means the great brooch-wearer. This was due to the insignia that was worn by him as coroner. George is said to have held court at his Clyth Castle in such splendor that it would rival any Highland chief.
15th century and clan conflicts
The Gunn's traditional enemies were the Clan Keith, who from their Ackergill Castle, challenged the Gunn chiefs for both political needs and for land. In one such feud it was claimed that Dugald Keith coveted Helen, daughter of Gunn of Braemor. The girl resisted Keith's advances but on learning that she was to be married to another man, he surrounded her father's house, slew many of the inhabitants and carried the girl to Ackergill Castle where she threw herself from the tower, rather than submitting to her kidnapper. The Gunns retaliated and repeatedly raided the Keith's territory however they suffered defeat in 1438 or 1464 at the Battle of Tannach. Both sides having suffered considerable losses agreed to meet and settle their differences in what is known as the Battle of Champions, where each side was to bring twelve horse. However the Keiths arrived with two warriors on each horse and slaughtered the outnumbered Gunns. This was in turn avenged by the chief's remaining son James who killed Keith of Ackergill and his son at Drummoy.
16th century and clan conflicts
Alistair Gunn, son of John Robson Gunn, had become a man of much note and power in the North. He had married the daughter of John Gordon, 11th Earl of Sutherland and for this reason "he felt entitled to hold his head high amongst the best in Scotland". His pride, or perhaps his loyalty to the Earl of Sutherland, led to his undoing when in 1562, he led Gordon's retinue and encountered James Stewart, 1st Earl of Moray, and his followers on the High Street of Aberdeen. The Earl of Moray was the bastard half-brother of Mary, Queen of Scots, as well as the son-in-law of William Keith, 4th Earl Marischal, chief of Clan Keith. It was the custom at the time to yield thoroughfares to the personage of greater rank, and in refusing to yield the middle of the street to Stewart and his train, Alistair publicly insulted the Earl. Stewart soon afterwards had him pursued to a place called Delvines, near Nairn. There he was captured and taken to Inverness, and following a mock trial, he was executed.
In the late 16th century the Gunns were involved in a number of feuds against the Earl of Sutherland and Earl of Caithness. In 1586 at the Battle of Allt Camhna the Clan Gunn was victorious but they were defeated shortly afterwards by a massive force at the Battle of Leckmelm.
17th century and Civil War
During the 17th century the Clan Gunn strengthened their links with the Clan Mackay when Gunn of Killearnan married Mary Mackay, sister of Lord Reay, chief of Clan Mackay. The next Gunn chief married Lord Reay's daughter.
Another branch of the clan, the Gunns of Bramore, who descend from Robert, a younger son of Am Braisdeach Mor were generally known as the Robson Gunns. Sir William Gunn, brother of the Robson chief, despite being Catholic served in the army of the Protestant king of Sweden, and rose to command a battalion. He later fought for Charles I and received a knighthood in 1639. He later returned to the Continent where he served the Holy Roman Empire and married a German baroness. He became an imperial general and was created baron of the Holy Roman Empire in 1649.
18th century and Jacobite uprisings
The Gunns did not support the Stuarts and fought for the British government during the Jacobite rising of 1745. Alexander Gunn, chief of the Clan Gunn was a Captain of an Independent Highland Company that fought for the British Government. He was later killed in action in India. The chiefship passed to a cousin with whose line it remained until the 19th century, when the tenth chief died without an heir.
The clan continues to have as its leader the current Clan Commander, Iain Alexander Gunn of Banniskirk; his Uncle was the first commander appointed in modern times.
On December 22, 2014 Lyon Morrow accepted a Petition for a Family Convention. He appointed John Malden Esq, Unicorn Pursuivant to supervise the Convention and report his findings to him. It has now been decided that the Convention will be held at the Ayre Hotel in Kirkwall, Orkney on Saturday 18th July 2015 at 2 pm., to coincide with the start of the International Gathering of the Clan, when all those who signed the Petition, plus Michael J Gunn and Alastair J Gunn, will be invited to attend.
Iain Alexander Gunn of Banniskirk was appointed the second Commander of Clan Gunn, by commission of Lord Lyon on 9 June 1972. He was Secretary of the Clan Gunn UK Society on its establishment in 1961. (The first Commander was his Uncle who held the title 1967–1968.) It is understood that his Chief inheritance line is twice through the female.
- Gunn's Castle also known as Clyth Castle was situated on a rock above the sea, eight miles south-west of Wick, Caithness. It was once a splendid and strong castle but virtually nothing remains. The fortress was held by the Gunns during their feud with the Clan Keith.
- Dirlot Castle near Watten, Caithness was originally held by the Cheynes but passed to the Gunns in the fifteenth century. However later it went to the Clan Sutherland and then the Clan Mackay.
- Halberry Castle near Wick, Caithness was held by the Gunns but there is now only some remains by the sea.
- Latheron Castle near Dunbeath, Caithness was held by the Gunns but passed to the Clan Sinclair in the seventeenth century and there are only slight remains left of the castle. Latheron House dates from the eighteenth century.
- Kinbrace, site of castle once held by the Gunns, although location is not certain.
The Gunn tartan is found in 'weathered', 'ancient', 'muted', and 'modern' colourings. A picture of the Tartan 
- Clan Gunn Profile scotclans.com. Retrieved 22 January 2014.
- Coventry, Martin. (2008). Castles of the Clans: The Strongholds and Seats of 750 Scottish Families and Clans. pp. 248. ISBN 978-1-899874-36-1.
- Way, George and Squire, Romily. (1994). Collins Scottish Clan & Family Encyclopedia. (Foreword by The Rt Hon. The Earl of Elgin KT, Convenor, The Standing Council of Scottish Chiefs). pp. 399 – 400.
- Smibert, Thomas. (MDCCCL). (1850). The Clans of the Highlands of Scotland, being an Account of their Annals, Separately & Collectively, with Delineations of their Tartans, and Family Arms. pp. 170 - 171.
- Gordon, Sir Robert (1580–1656), A Genealogical History of the Earldom of Sutherland. p.63–64.
- Sinclair, Thomas. (1890). The Gunns. p. 36.
- Clan Gunn history electricscotland.com. Retrieved 25 February 2014.
- Gordon, Sir Robert. (1580 -1656). A Genealogical History of the Earldom of Sutherland. p.183.
- Simpson, Peter. (1996). The Independent Highland Companies, 1603 – 1760. pp. 214 – 215. ISBN 0-85976-432-X.
- Chiefship of Clan Gunn Clan Gunn Society.
- Clan Gunn
- Clan Gunn Society UK
- Clan Gunn Society of North America
- Clan Gunn Society of North America – Eastern Canada Branch
- Gunn DNA Project
- The Clearance village of Badbea; by a Gunn descendant
- Gunn @ ElectricScotland
-  Lord Lyon on the Family Convention rejection
-  Lord Lyon on a Gunn Chief issue.