[Ger-Poland-Volhynia] Germans in Poland, Russia

[dollyhauf at peoplepc.com]

Hello All;
I am trying to find a link between the places these Hauff brothers have listed on different papers as their home or place of birth. Is anyone familiar with these places? Are they in the same territory? Where would I begin to look for their births or Baptisms and find out about their parents? They were Germans, Lutheran. Father should be Daniel Hauff and mother should be Matilda or Justina or Christina Fredrick.

Hauff, Ferdinand, born Aug 15, 1883. Places listed on different papers are  Chelin;  Lublin, Poland; Lublina, Cubern, Poland

Hauff, Adolf, born  Dec. 15, 1886. Places : Ostrowicz, Russia. Left for the US from Glowic, Plock, Russia

Hauff, Gustav, born Aug. 15, 1888, Place: Russia, Poland 

Hauff, Wilhelm, born May 13, 1889, Place: Chelm, Poland, Russia

Hauff, Gottfried, born March 24, 1894, Places: Binof, Russia, Poland;  Tubin (Lubin?), Russia

Hauff, Edward, born Nov. 29, 1895, Place: Bieniew Lubin, Poland

I would really appreciate any ideas you have as to where I should start looking !!!

Thanks so much;
Dolly Hauf