_Alexander ROBERTSON _ | _John ROBERTSON _____| | | | |_Elizabeth STEWART ___+ | _David ROBERTSON ____| | | | | ______________________ | | | | |_Margaret CRICHTON __| | | | |______________________ | | |--William ROBERTSON | | ______________________ | | | _____________________| | | | | | |______________________ | | |_____________________| | | ______________________ | | |_____________________| | |______________________