My grandfather Tadeusz Marciniak is from a small village called Zagorov in Poland, He was in a forced labor camp, and survived. I wonder if you can help me find if I have Jewish roots.
You may want to post in the Poland Genealogy Group where someone will likely be able to help. https://community.familysearch.org/en/group/157-poland-genealogy-research
There are some wonderful websites for Polish research.
Are you able to provide more details about your grandfather that would help to search for him ?
When was he born ?; did he got married / where ?; when and where did he died. ? If not about him then one of his siblings if he had any.
There are 2 places named Zagórów located far away from each other. One in Wielkopolska the other one in Małopolska. Do you know any more details ?