hello dear Fernando saw your posting, all the Zeilins are family but we are related far out if you give me the firstnames you have I'll try to direct you to the closest family to your side. There are Zeitlins in so many countries.And I have together with 6-7 other researchers tried to make a tree of all of us. My Zeitlins were Solomon born in Minsk married to Caecilie Sack, she was my gggrandfathers sister. he was a Phycician and they lived in Berlin and in Schweitzerland. Cecilies nieze Amalie Sack Taube married to a baron von Taube had children, that outwandered to Argentina and Brazil I'm looking for other relatives in thiese families that came to south America. Please write to my Email this is exiting all the best from Pheya Yair.