David Kraus 1893 1984 Russia Idaho I Am Looking for a Connection Between My Great Grandfather David Kraus and His Father Whose Name I Think is George

David was born 8 Aug 1893 in Archiday(Ochiday), Russia. His last place of residence before coming to the U.S> was in Saratov(Saratoff), Russia. His naturalization application says he came over on the SS Kaiser Wilhelm about July 1902, but I think I found him on a passenger list on the Campania in June 1902. He married a Katherine GRAF (GRAFF) in Rexburg, Idaho on 20 May 1913. I have found numerous Census records of him and his family (wife and kids) once getting to the U.S. but can't seem to find anything connecting him to his parents an/or siblings. The only information I have are names on a number of Family Tree sites (Ancestry, FamilySearch, etc.) I find George KRAUS and Katherine TOWE(RAU) listed as his parents, but no real source or evidence showing that relationship.

I would really like any substantial proof to the identity of David's parents. Any information beyond that would be a bonus.