GDG-codori or cordori

[Bob Coffman Jr - Info From Data]

>It should be kept in mind that spelling of proper names was still far from
uniform at the time, at times, even within the same family.  This could be
particularly true when European family names were Americanized to better
blend with society or, hopefully, avoid prejudice.   
 
>Jim Cameron    

I can attest to that, as my mother has constructed our family tree going
back into the 1700s.  There are numerous variations on my surname and those
of my ancestors... 

Bob Kauffmann 

I mean Coffman.