Thank you for replying to my post. Unfortunately, I can not be of much help. The Walt Kopper I mentioned married one of my grandfather's sisters. Her name is Adele Dreves (the name also appears as Dreefs, Drevs, etc.) My grandfather's family, as far as I can tell, came from West Prussia to New York just after the turn of the century. I am not certain if Adele was born in Prussia, or in NY. The last I heard she was living with her daughter in England - I am trying to get in contact.
In my research, I have found a number of Koppers in and around the Schenectady region of NY. Not quite Buffalo, but not too far.
Good luck with your search. If I happen upon anything of interest I will try to post it here. Thanks again.