Well, come on - Bogarus definitively comes from Belarus - units such as Voivode (Wojewoda) or Veliki Knyaz (Wielki Kniaz) or Druzhina (Druzyna) confirm that. Also, some of the national summons (for example Likho -> Licho, Leshiy -> Lesny) - and I'm not exactly a specialist on Belarus folklore.
I added some pretenders and summons, also changed Stryga to the more appropriate Strzyga
