I knew this Kostelnik family here in Pittsburgh PA. Marie married Michael Papinchak and lived next door to us most of our lives. Marie ( a.k.a. Mary ) and my mother were best friends. They lived at 3416 Gass Avenue, Pittsburgh PA 15212. I may have told you all of this a few years ago. Marie & Michael are buried in Highwood cemetery in Pittsburgh. Three of their 5 children are still living. You can contact me at
jan82942@aol.com