[Ger-Poland-Volhynia] Search for descendants of Rudolf Balkau/Balko

[Birgit]

Dear list members,

I am searching for my ancestor Rudolf Balkau/Balko (Parents: Samuel Balkau  
and Karoline Zitlau). He was born on 19th of march 1883 in Marianowo near  
Pultusk/Poland and he emigrated to USA on S.S. Zeeland in May 1907 with  
his sister Anna.
Rudolf had 5 siblings I know: Anna, Jakob, Wilhelm, Ottilie and Samuel.  
Some of them also went to USA by ship.

Your help would be very much appreciated.
Birgit Jenning