let's keep in touch, as my cousin (he is greatgreatgrandfather's brother descendant is very active in searching our genealogy. Unfortunately he moved to Czech Republic again and temporairly we lost contact with him. His name is Marek Kassik.
As the name is not very popular it is possible that we are family :-)))
What I found that my greatgreat granfathers had property somewhere close to Prague (only Marek knows exactly where). One of their children was my grannys father, who moved to Lwow (autro-hungarian empire) and married grannys mother. My granny only once saw her grandparents as propably the marriage was messaliance.
I received answer from town Prague archieve - thei did not find my ancestors.