[Ger-Poland-Volhynia] Dornkinke ?

[Krampetz at aol.com]

I found the Ellis Island manifest for my cousin's other  grandmother.
 She had a German name of Kretschmann,  born in 1871 and had  listed 
  the village of "Dornkinke" as her home.  (the  handwriting Could be 
"Domkinke")
  Nationality is listed as "Russia",   her  ethnicity listed as "German".
 
  My cousin always thought she was from Germany,  but like our  other common
  grandparents that also claimed to be from Germany - we learned they  were 
  born in Russian controlled Poland,  near Lipno also  in the 1800's.    
 
  I've given up trying to understand why they claimed  different  countries 
of 
  birth once they got here,  but I'd like to confirm if my  cousin's  
Kretschmann, 
  of ethnicity "Russia, German"  meant she too was from  Russian controlled 
  Poland..      Where was (or still is) the  place of "Dornkinke" ??
 
Thanks
Bob K.