For me,
Bogdana and it's other Slavic-language variants like
Bohumila,
Božena, etc. don't work because it's literally like "god's gift" of "loving god" etc. I do really like Slavic names though, even the older, weirder ones that aren't in use much anymore.
These are the "rare" Slavic names (or Slavic derivatives of Western names) that catch my fancy. Not to use really, just because they're cool.
AmandAurelián
AzariášCypriánErazim
Jimram
Zvonimír
Aglaja
Amadea
AmátaAristid
EufrozínaJorika
PolyxenaPriska