The Colquhoun clan, also known as Clan Colquhoun, is a Scottish clan with a rich and ancient history. The Colquhoun clan takes its name from the surname Colquhoun, which is believed to have territorial origins. The name is derived from the lands of Colquhoun, situated on the eastern shores of Loch Lomond in present-day Dunbartonshire, Scotland. The family likely took their name from this place and became associated with it. The Colquhoun family has ancient roots in Scotland, and their history can be traced back to the 13th century. They were a noble family and held lands in Dunbartonshire, including the ancestral seat of Colquhoun Castle. The family gradually gained prominence and influence in the region.