The popularity of the Book of Records probably doesn't have much relation to sales or awareness of the Guinness drinks. Guinness Extra considerably predates the 1850s: Guinness has been a big manufacturing operation and a big brand for a long time. (However Guinness Draught, being a keg beer, is naturally from the 1950s, though it's the successor of Guinness' cask beer.) Several other European beer brands have histories going back to at least the late C19: Heineken, Carlsberg, Paulaner, ... Several of the famous Italian amaros like Fernet-Branca and Campari are solidly second half of C19; so is Angostura. Chartreuse is considerably older. Several Scottish whisky distilleries have quite long histories of continuous production, though of course the current international fame of Scottish single malts is relatively recent. Bacardi was distributed outside Cuba since at least the 1930s.
That isn't the argument I'm making. I'm simply showing the prevalence of the ngrams "Guiness" (capialised) and "Guiness *" (same, followed by any other word).
"Guiness Book" clearly trends in print before any reference to a beverage, in the US-English corpus.
If you have a complaint, it's with Google Books and its ngram viewer.
