It must be Wróblewski, as the Worblewski surname does not exist in Poland. Wróblewski is a very popular surname in Poland, and the Poznań region (Wielkopolska) is one of its main strongholds. A number of coats of arms accompany it. There are 4 times fewer Pałkas but it is also quite common. Pałka is a typical peasant name unaccompanied by heraldic devices.
For more info please contact me
I know this post is old but my maiden name is Palko. It used to be Palka but it was changed when my ancestors came to America. I have no history of this side of the family other than this bit of information. This is from my fathers side of the family.
Also, my great-grandmothers maiden name was Wrublewski on my mothers side of the family.
Weird to see both names in one post!