Something I’ve been working on lately is a list compiling all instances of Bulgarian player names that I come across in the various source works used for crosstable updates. I have used Gaige’s Chess Personalia as my standard where possible for spelling and transliteration, but have found that the less well known Bulgarian players are frequently not listed in Gaige. So I started my own list. If there is interest, the list could be posted on my website.
So far the list includes any Bulgarian opponent from a Minev game, all participants in Bulgarian championships through 1988 (including some open championships, some semi-final events, and using Sergiev), all participants in Bulgarian team championships through 1981 (using Parva), some listings from the Bulgarian chess encyclopedia, and some listings from Shakmatna Misl.