The family of Buchanan-Dunlop is descended from Buchanan of Drumhead who in turn is decended through Drummakill.
The first of the family of Buchanan-Dunlop was Robert Buchanan-Dunlop who succeeded to Drumhead upon the death of his cousin Archibald Shannon-Buchanan Detail of how the family first took the name of Buchanan-Dunlop is set out under Buchanan of Drumhead.The arms are recorded in the Public Register of all Arms and Bearings in Scotland ( Lyon Register ) Volume 20, Page 19, dated 21 January 1909
THE ARMS: Quarterly, first and fourth, Argent,a double headed eagle displayed Gules in the dexter chief point a mullet Azure, a bordure of the second; second, Or, a lion rampant Sable holding in his sinister paw a bow and in his dexter an arrow all Proper within a double tressure flory counterflory of the second; third grandquarter counter quartered, first and fourth, quarterly. first and fourth, gyronny of eight Or and Sable each gyron charged with a trefoil slipped all countercharged; second and third, Argent, a galley Sable, sails furled, in the centre of the quarters a crescent a crescent Gules, for difference; second and third, Gules, on a bend Argent, three crescents Azure, in the sinister chief a spur revel of the second, in the centre of the grandquarters a martlet Sable for difference.

THE CREST: A rose Gules barded seeded and slipped Vert
THE MOTTO: 'E Spinis' ( From among the thorns )