This post was deleted by the author on 16 Dec 2012 10:30PM GMT

First rule.... vary the spelling as you are most likely dealing with an Americanized spelling.

ZADWIK is found in Ellis Island records from Suwalki Russia, which is now SUVALKAI Lithuania.

For Jewish Anestry there is a good web page:

http://www.jewishgen.org/

Robert Jerin

Neither spelling of the surname is to be found at the Hamburg Emigration Archives :

http://linktoyourroots.hamburg.de/ltyr/Suchmaske/en/1,3825,,...

Reg Niles