I am researching my husband's family - his paternal great grandfather Nieroda came to America, married, had a couple of kids, and died during the spanish flu epidemic. It took some detective work on my end to work out the Ellis Island records calling out a non-existent town (Petrazowa) was indeed Pstragowa. Since then I have seen online that the local church has Nieroda's. Its not a common last name here, so the dots seem to fit. Would love to know how far back church records can get us!
I don't have many leads for the other last names (from my husbands mother's side)