I'm looking for family members of my grandfather's first wife, Anna, who we believe was from Stare Bystro, Poland. She also had a brother, John, that lived in Mt Pleasant, PA.

Their father's name was also John and he was born on 12/24/1875. Their mother's name was Michalina Szaflarska. Could possibly have been from Stare Bystro, Poland also or surrounding area.
If anyone has any information in regards to this family, could you please let me know.
thanking you in advance for your help!