Place: Par. of St Boswells, Roxburghshire, Scotland
Note: The 9th day Robert Fairbairn and Agnes Landreth both in this parish gave up their names in order to marriage and gave in Bond and Caut.. with twelve shillings Scotts money to the poor box in .. of their .. were married by .. banns upon January 6 day 1757 years
Both Y-DNA and autosomal DNA matches exist between descendants of Robert and of his presumed brother Archibald. 
It may be possible to confirm family relationships with Robert by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree:
The father's "confirmed with DNA" indicator was removed from this profile since it was not properly documented.
Before marking his father as "confirmed with DNA", please add a statement to this profile documenting the two matching Y-DNA tests used to confirm his relationship to his father in the format documented here: Help:DNA_Confirmation#Y-Chromosome_Confirmation.