The progenitor of Clan Lamont, very little is known of him. What is known, however, is that he likely went by the name of Fearchar Mac Dunslebhe, given that he was one of the sons of Dunslebhe, who was one of the sons of Aodha Alainn O'Neil, who was born of the line of Anrothan O'Neill, the last High King of Ireland to hold court at Tara. Fearchar most likely lived in the mid to late 12th century. It is also known that he had two sons, Duncan and Malcom. Malcom MacErchar was father to Laumon, who later gave his name to the Clan. Unfortunately, it is unknown when Fearchar died or where his grave is located.