I need help finding my Crobak family, if anyone survived.

Hello all. Myself and my mother have been searching for 10+ years for any family members that may have survived the Holocaust. My Great Grandmother was a survivor and the only information she gave anyone before she passed was that she was separated from her mother and sisters right off the train. One sister was taken straight to the chamber. We do not know if her father was alive, if she had any brothers, or what happened to her mother and sister or sisters. The only information we have was that they lived in Tarnowskie Góry when the war began. There are a few variations of her maiden name and that she was Roman Catholic. Does anyone have any idea what off the beaten path I could take to find someone? My Great Grandmother had nine children here in the states and seven are still alive. Including a son that was conceived while she was a prisoner. Any help would be appreciated.

Maybe try searching for records in Catholic parishes in Tarnowskie Góry?

Try searching for "Krobak" too ("Crobak" doesn't sound polish with "C" in front).

I would also give Chrobak a try since it is an actual word in many Polish dialects (including the Silesian dialect - Tarnowskie Góry is in Silesia)

Right, I should've realized that Chrobak is popular surname too, probably even more than Crobak or Krobak.