I read War and Peace recently, is it the same amount of characters? At some point I almost started a genealogical tree of the characters.
E.g. Dima (widely used in modern Russian, and it’s clear that it’s short for Dmitry) instead of Mitenka or Alex instead of Alyosha (Lyosha is commonly used in Russian, but Alex would be easier to make a mental connection... until you have an Alexander and have to shorten that to Sasha; that one is probably a more widely known diminutive though)