Genealogy / LOOKING for Kogoska or Kogoski origin around Biezun - came to America @1890 [7]

I ve been working on my ancestry and having a hard time with my Polish origins due to many spellings of our name - My greatgrandfather and his family and mom came to America in the 1890s and according to Ship Registry, his sister, my great aunt was from Biezun. I know nothing about Biezun, however, the spellings of her surname was Kogoska (on ship ledger) but her brother (my GGF) went by Kogoski so it is very confusing. Any ideas would be appreciated very much. Thanks!