Roy Murdoch Buchanan Williamson (25 June 1936 – 12 August 1990) was a Scottish songwriter and folk musician, most notably with The Corries.

Williamson and Browne also shared a passion for rugby, having played wing against each other for Edinburgh Wanderers and Boroughmuir, respectively.

Williamson joined Bill Smith and Ron Cruikshank to form the "Corrie Folk Trio" in 1962.

The Trio had already accepted an engagement at the Edinburgh Festival, so Williamson suggested that Ronnie Browne should be asked to join the group in order that it would have three members again.

[citation needed][3] It was sung in the 2007 Commonwealth Games by Ronnie Browne, though he swore never to sing it again, saying that it was a struggle not to be overcome with emotion.

The wood for the combolins was obtained from antique hardwood furniture as well as premium grade Tyrolean spruce, and displayed Williamson's artistic embellishments in silver and mother of pearl.

The Corries' album, Strings and Things (1970), was specifically designed to display the new instruments: It featured detailed descriptions of them on the rear sleeve.

Williamson had advertised the combolins a year prior to completing them and had first tested them only a short while before a concert but found that they sounded terrible.