We are generally assigned by most authorities as a sept of the Sutherland Clan and we normally use their tartan. They maintain a WebSite that is a source of information about them, the organization and activities. The clan crest and the Countess's coat of arms images below were obtained for that site.
1) The Countess of Sutherland's Coat of Arms
2) Sutherland Clan Crest mounted on tartan
3) Sutherland Tartan
Past Cheyne Arms