I did not think to look for Jacob Parkos's birth record. That is something I will need to have done. Vaclav and Jan are certainly brothers, and I have their parents records, such. I have a search that is connecting Martin and Josef Bicek as brothers. I also have more information going back. I have been meaning to contact Shirley Slanker for some time, but have been caught up in other items. What might work best if you and her contacted me at my other email address ThePaveks@hotmail.com
, and we could discuss the Parkos and Bicek families in detail.