Just in case you do no know this site. Here is a list of places that used to be in Prussia before the end of WW II and are now in Poland. Althoush you might not understand the introduction the names of places are in alphabetical order and you will soon find the Polish aquivalent for the German name of the palce and vice versa:
http://de.wikipedia.org/wiki/Liste_deutscher_Bezeichnungen_p...Gaby