About James Cockburn
Extract from The House of Cockburn of that Ilk, and their cadets. by Thomas H. Cockburn-Hood (Edinburgh 1888) pages 79 (http://archive.org/details/houseofcockburno00cock)
Robert had two other sons, James and William. James had lands in East County Reston and also in the territory of Eyemouth, dying unmarried, William was served his heir.