Foursquare Dominus. Dominus is the Latin word for master or owner. The rum is noted as being “Master of the House” on the rear label. This convention continues the theme of similarly named rums from Foursquare such as Tryptych, Principia and Criterion. It is worth noting that such “fancy” names are quite common in the whisky world. The likes of Ardbeg are well-known for their curiously named bottlings.