Thank you Hannia; hope all is well with you. The first entry (Jakob) is the one of greatest interest to me at the moment because I have the feeling he is my grandfather. Eugenia has kindly accepted to look into this case to see if more information can be obtained. I have exchanged emails with the second entry, Vladimir, but could not link yet with his family. The last entry (the chemist) is new to me and again of interest because it is in Kazakstan (in the event that the first entry is verified. Otherwise there is nothing new on my Czyzski front. Best wishes.