Some Buchanans fought on the side of the Covenanters at the Battle of Bothwell Brig in 1679. One was George Buchanan (1657–1719) (later a magistrate, maltman (whisky distiller) and successful Glasgow merchant), the son of Andrew Buchanan of Gartacharne (a small farm () 2 km due south-east of Drymen). George was the father of four of Glasgow's most distinguished citizens: George Buchanan of Moss and Auchentoshan (maltman and Glasgow city treasurer and bailie), Andrew Buchanan of Drumpellier (Tobacco Lord and Lord Provost of Glasgow), Archibald Buchanan of Silverbanks and Auchentortie (Tobacco Lord) and Neil Buchanan of Hillington (Tobacco Lord and Member of Parliament for Glasgow district of burghs). These four sons were among the founding members of the charity, The Buchanan Society of Glasgow.