Genealogy / THE MEANING AND RESEARCH OF MY POLISH LAST NAME, SURNAME? [4500]

It would be nice to know the meanings of my family's surnames: Bartkowiak and Martinski.

I have once heard that Bartkowiak is just a Polish version of the name Bartholomew, but I don't remember where I heard that. A local library genealogy book listed Bartkowiak to mean "battle ax". After reading the various ways surnames were constructed on this site and a few others, I'm now pretty sure both of these interpretations are false.

As for Martinski, I haven't found anything on the meaning of this surname.

Also, is it possible to suggest where in Poland that these two surnames might originate from? It would give me a clue as to where to start looking for family history records.

Thanks for your help.
Seofon