What Irish company brews a beer popular in the Caribbean?
Beer in the Caribbean: The beers of the Caribbean are unique to each island in the region, although many are variants of the same style. Beer in the Caribbean:  Contract-brewing of international beers is also common, with Heineken Pilsener and Guinness Foreign Extra Stout being the most popular. Guinness Foreign Extra Stout: Guinness Foreign Extra Stout (FES) is a stout produced by the Guinness Brewery, an Irish brewing company owned by Diageo, a drinks multinational.
Guinness Brewery