Re:.Bercik, Bercsik, Berzik, Berzsik
I do not see Na-naturalized or Al-alien on the 1930 census?Did you notice it?
It seems that Susie immigrated 1900 with a daughter Mary (Maria)and John (Janos, Jan) 1900/10.
Do you know how BERCHEK was pronounced?Is "chek" as check or chick?
The SK's phone book is listing BERC^IK.The ^ is a diacritical marking in this case on letter C which is a sound of English CH.It is possible that they came thru Baltimore, Boston, Philadelphia or even Canada if you can not find them in EI with www.stevemorse.org