Clan MacLennan, also known as Siol Ghillinnein, is a Highland Scottish clan

Scottish clan

Scottish clans , give a sense of identity and shared descent to people in Scotland and to their relations throughout the world, with a formal structure of Clan Chiefs recognised by the court of the Lord Lyon, King of Arms which acts as an authority concerning matters of heraldry and Coat of Arms...

 which historically populated lands in the north-west of Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

. The surname

Surname

A surname is a name added to a given name and is part of a personal name. In many cases, a surname is a family name. Many dictionaries define "surname" as a synonym of "family name"...

 MacLennan in Scottish Gaelic is Mac Gille Fhinnein meaning the son of the follower of St Finnan.
According to tradition the clans MacLennan and Logan are related. In the fifteenth century a feud between the clans Logan

Clan Logan

Clan Logan is a both a Highland and Lowland Scottish clan. The clan does not have a Chief recognised by Lord Lyon King of Arms, and therefore can be considered an Armigerous clan...

 and Fraser

Clan Fraser

Clan Fraser is a Scottish clan of French origin. The Clan has been strongly associated with Inverness and the surrounding area since the Clan's founder gained lands there in the 13th century. Since its founding, the Clan has dominated local politics and been active in every major military conflict...

 ended in a battle at North Kessock, in which the Clan Logan chief, Gilligorm, was killed.