Hi
One of my cousins found an obituary clipped from the news paper among her mother's things.
We found out that Katherine Lubas had a sister Maryanna who came to the US and then returned to Poland and married a fellow named Witasek.
Katherine also had a step sister named Agnes Fulick who came to Lawrence MA, married Frank Czapla and moved to NJ. She also had a brother Jacob who lived in NJ.
I don't know if this will help you but maybe someone out there recognizes one of these names.
Still looking for connections.