Dunbar and Cockburn DNA. Cockburn still seem on locality, Dunbar seem scattered because of battles;
Duinbar/Cokburn on 1654 map together; http://maps.nls.uk/view/00000383#zoom=5&lat=2008&lon=4226&layers=BT If one has the surname Dunbar, and R-S5750 SNP then they adopted the surname as being “de Dunbar” from Dunbar. If one has the surname Cockburn, and R-S5750 SNP then they adopted the surname as being “de Cockburn” from Cockburn, near Dunbar. This is supported because of the closeness of Dunbar, and Cockburn, and sharing from the same Y-DNA grouped region. The Dunbar are dispersed with their concentration, because Dunbar had battles; https://en.wikipedia.org/wiki/Battle_of_Dunbar There were three Battles of Dunbar between England and Scotland. Battle of Dunbar (1296), in the Wars of Scottish Independence Battle of Dunbar (1489), Scottish victory in sea battle Battle of Dunbar (1650), in the Third English Civil War There was not of nearby Cockburn a battle, and that is why the Cockburn are concentrated near Cockburn http://named.publicprofiler.org/ using census data.
Dunbar, comes from a dun (brown) bar (barrier); a sea barrier brown in color.
Cocklaw, comes from cock-coke-coal, law (small hill); a hill with coal.
Dunbar and Cokelaw are nearby each other containing the same pool of Y-DNA at time of surname adoption.
Dunbar are scattered because of battles, and the Cocklaw are concentrated near Cocklaw because of no battles.