I've been working on a project in which Manchuria and the traditional "Far East" (Amur Oblast, the Southern half of Khabarovsk Krai, and Primorsky) are part of an SSR that forms if the USSR never gave Manchuria to the CCP, and when the Soviet Union collapsed, it became an independent nation. The ethnic makeup is plurality Chinese but with Russian language, and a large minority of Russians and a small minority of other groups (thinking 45-40-15% Han-Russians-Other respectively), but I don't think it would be right calling it "Manchuria" since it isn't really a part of China, and calling it the "Far-Eastern Republic" isn't right either since a large majority of the population doesn't live in the Maritime areas. Yellow Russia/Green Ukraine definitely isn't it either, which are two slightly less common names for the area (especially in alt-history genres), but I don't want to call it Transamur, because of the Kaiserreich connection.
This isn't really a discussion of plausibility of the state, just an alt history naming scheme for this place.
This isn't really a discussion of plausibility of the state, just an alt history naming scheme for this place.