Well, wine improves with age, but I can't find any monsters with names that relate to wine... or any other alcoholic drinks (or drinks at all), for that matter. Or maybe there's some kind of brand that I'm not familiar with that's referenced in one of their names.

Edit: The only answer I could think of is Scotch. Scotch isn't a monster, but his name is also a type of whisky (which does improve with age), and also a name for someone from Scotland, and the Scottish have a reputation for being stingy.