 In 1998, his son, Mark Edwin Andrews III, launched Great Spirits LLC, which made Knappogue Castle 1951 available to the public.In 1999, the company introduced vintage-dated single malts, under the same brand name.In 2003, the Great Spirits was merged into Castle Brands Inc, and in 2010, Castle Brands introduced Knappogue Castle 12 Year Old Single Malt.