Glendullan Speyside Scotch Whisky The seven original distilleries of Dufftown were known as the Seven Stills and the Glendullan distillery was among their number. Glendullan was founded in 1897, by William Williams and Sons. Five years later the whisky was to become the favourite tipple of Edward VII. Today, single malt Scotch whisky from Glendullan is released in part for export. Diageo include it as one of their three Singletons, the other two being Glen Ord and Dufftown. Whilst Singletons Dufftown and Ord were released for the Asian and European markets respectively, the Singleton of Glendullan is destined for the US.