Dear Donna, On the Polish Border Surnames list, someone posted a website which lists highlander and other regional costumes. try: http://www.perfekt.krakow.pl/stroje_en.php I noticed that the region from which one of my grandfathers came has regional dress similar to that which you described on the pictures of your sister-in-law's grandparents. White full sleeves and black vests. My grandfather's region would be the one under Nowy Sacz . Hope that this may help you. Noreen