Gustave Dornberger married Lillian Sloan or Fergerson from NJ. (Lillian's mother was Sarah Sloan Graham.) Gustave was born in CA went to NJ to work.He was a clerk for the RR.Gustave and family went back to CA with his family.They all died in CA. Gustave and Lillian had a girl child born 1887? Fredick Lambert Dornberger born Sept 1896 in NJ and died in 1960 in CA. Harold Lambert Dornberger died in the 1930's.Fredick married Emily Delange in the 1920's.This union had Lillian May; she died 2001 and Donald Alan Dornberger.Donald gave me this info.I think your line is thru Frderick Dornberger born 1872 in Germany married Helena who was born 1874.They had Frederick born 1897 and Simon born 1898. If I can be of any more help let me know.We could be related from Alsace Lorraine.There were many Dornberger's coming from that area.Good luck.