Dear, Łucja! Unfortunately I don't speak Polish but I can say you some facts that may help you in research
If you a looking for information of your ancestors which have Okminski herb you can look here:
https://books.google.by/books?id=y37RAAAAMAAJ&pg=PA61&lpg=PA61&dq=okmina+herb&source=bl&ots=FuZKpr ...