This won't exactly answer your question(s), but may clear up some of it.

The "pink Niagra" (Niagara?) et al I assume were brands (I'm assuming US), and like other brands, when they lose favor and no longer make enough money, they are abandoned by their producers.

"Sauterne" is in the US a sort of generic word, referring to the French "sauternes" (note the s on the end), a wonderful Bourdeaux dessert wine. The US "sauterne", though it uses a form of the French word, is a relatively dry wine rather than a dessert wine, and is nothing like its namesake. I think that changing public tastes in the US have put paid to "sauterne" also--and good riddance, say I.   I'm not sure whether the French "sauternes" is a French place name, like Burgundy, Bourdeaux, and so forth, but if so it may be considered later when I talk about place-named foreign wines.

Zeller Schwartze Katz (Cellar Black Cat) is a German brand name, as is Blue Nun(which is a liebfraumilch). I'm sure they are still available, and as always, only from Germany.

However, names like Bourdeaux, Burgundy, Champagne, (and Sauternes?) and Chablis, from France, and Soave and Chianti from Italy, are another kettle of fish. These are place-of-origin names, and the EU has cracked down on their use for wines not from those areas. That's binding only in the EU, but a number of non-EU countries are honoring it, and the EU are pressuring the US to follow that rule, and it looks like that's what's going to happen--not only with wine, but with other consumables like cheese, and so there may soon be no American Parmesan, Cheddar, and a number of other cheeses with foreign place names.

That's why we see so many American wines with grape-varietal names these days. I applaud that for wines, but I have reservations about applying it to cheeses. But then my druthers are hardly controlling, are they?

I hope this (while it doesn't quite answer all your questions) has been helpful.

Dave Oesterreich