might be of interest.
Found your old post and followed up and found out that the KARCEK is actually KARKHECK. Hoping for a few hits for you with a correct spelling.
Our first ancestors married within same region, religion (few exceptions) but for sure one common language to communicate in. If they married in "old country" the villages would be within 10 miles radius. Leaving posts from left to right on Ancestry board for you.