Genetic evidence has shown that the Cockburns are descended from the same Anglo-Saxon clan as the Earls of Dunbar, and their predecessors, the 11th-century Earls of Northumbria.
Genealogische Beweise zeigen, dass die Cockburns vom selben angelsächsischen Clan abstammen wie die Earls of Dunbar und deren Vorfahren aus dem 11. Jahrhundert, die Earls of Northumbria.