>>36138
>"Bela Kun"
The Hungarian Soviet in 1919 was led by Kun Béla, originally Kohn, which has a few versions, such as Cohen.
His grandson, Kun Miklós is quite good historian. His field of research is the Soviet Union and communism, due to his relation (and his moms was "Soviet") he had/have access to Soviet, then Russian archives (and in them, documents) which no other Hungarian had to. This makes his works invaluable.

academia.edu might have some articles.