Technically, Sverdlovsk is one of the ex-Soviet states. It's one of the ones that can choose to either become authoritarian with the promise of restoring the Soviet Union later, or elect Boris Yeltsin
That said, I totally get it. There are a
lot of names to remember. Vyatka is the Romanov state in the west - the one that
isn't under house arrest. Samara is either the Nazi-collaborators or the ones who think Slavs are the superior race and want to adopt Nazi tactics. Don't remember which. Krasnoyarsk is the megacorp country that was given content in a recent patch. It is in Central Siberia.