Descendants of Nathan Giller - Ljubar, Russia to

I have traced back to my Great-grandfather's emigration to the U.S. in 1906.He came from Ljubar, Russia - now a part of the Ukraine.He had a cousin Max Ferschtman who came to live in Omaha, NE during the period from 1906-1920, Nathan Giller and family then moved to Dallas, TX.Any information regarding this family would be greatly appreciated.