Ron, I know your message has been posted for a while, but I hope you are still interested in your Doerner Family Search. My wife's Great, GrandMother was maria (Doerner) Zimmermann who married Joseph Zimmermann and came to newark, NJ from Germany. I just received her a copy of her Death Certificate, 11/18/1910, Newark, Essex County, NJ. I have been unable to read the 1st name of the informant who signed her Certificate until I ran across you message. I think the signature is that of a Reinhold Doerner??? Did he have any Family in New Jersy that you are aware of??? I found his name on the Social Security Death Index, with his date of birth and death. He would have been 23/24 when maria passed on. Let me know if this information connects with your Doerner Family History. Take Care!! Jim W.