title_body: Creating Fictional Slavic Place Names
upvoted_answer: Unfortunately, the English Wikipedia does not have an article on Slavic toponymy yet, the best attempt I am able to find is Bulgarian placename etymology giving at least some hints. You can find interesting Slavic roots to play with in the article on Slavic given names.
  
  Additionally, there are some Slavic based conlangs out there, you can honour one of them by employing it in your fictional world, to drop just names Slovio, Interslavic, see also Pan-Slavic language for an overview.