Williams Bros Brewing Company is a Scottish family-owned microbrewery, founded and operated by brothers Bruce and Scot Williams.

The Williams Bros. Brewing Co. started life in the humble ‘Glenbrew’ homebrew shop in Glasgow. The first beer brewed was the ‘Fraoch’ Heather Ale at a small 5-barrel brewery in Taynuilt, After the 2nd year of brewing in the Taynuilt brewery and with demand far out stripping supply the brothers decided to expand and also to diversify the range with five Historic Ales. These ales were produced at the new purpose built brewery and premises in Craigmill, Strathaven from 1998-2004.

In 2004 the brothers took over the ‘Forth Brewery’ at Kellibank, Alloa where Maclay’s had been contract brewing and packaging their beers since the sale of their old Alloa brewery. It was at this stage in proceedings that Heather Ale Ltd became Williams Bros. Brewing Co.