It is my understanding that the feminine endings are basically just possessives: Hiblova means "Hibl's". That could be "Hibl's wife", but it could also be "Hibl's daughter".
As for what she used, that comes down to context. If the gravestone was in Czech, then all of the names (and dates and platitudes) were in Czech. If a death certificate (say) was in English, then the names on it were in English: Mrs. Rosalie Polensky. I don't know what they generally did with Slavic maiden names in English, but if she was born in a Czech-speaking context, then what she did with it in English is mostly irrelevant to WikiTree.