@wilmhit - This sounds like a job for Wikipedia!
"The "Dry" in the brand's name refers to not being sweet, as in a dry wine. When John J. McLaughlin, who first formulated "Canada Dry Pale Ginger Ale", originally made his new soft drink, it was far less sweet than other ginger ales then available; as a result, he labelled it "dry", or it's a reference to a clichéd joke, "Don't drink Canada dry" uttered when someone is taking (at your expense and patience) at a waterfountain."
@dolari it recently became available in my country so I'm still thinking about how it's connected to Canada and why it's wet.