My wife's family are mostly slovak. Her great grandfather Alexander Cviek grew up in the village of Michalok in the early 1900s although the family believed that his parents were of Polish descent possibly from the area around Sanok.
We have found baptism records for two potential siblings in Petkovce the nearest Greek Catholic parish to Michalok and they give birth locations in Galicia for both parents however we have been unable to trace the localities.
The father Jan Cviek was from Sztwencsa and the mother Paraszkeva Czimbala was from Szklowszolyni
I have included the links to the records below and attached a copy as my reading of the names may not be correcthttps://familysearch.org/pal:/MM9.3.1/TH-266-11629-159612-76...
Anna Cviek is on Page 93
Ivan Csvek is on Page 95