Ms. COOPER,
Have you ever thought of Ireland as to where from the surname had originated? I have a TWISS/COOPER Connection in the 1700's in Kerry and an eastern Irish Cty. (unfortunately at this point, I do not recall it, as it was the wife who had moved to Cty. Kerry.
This is merely a suggestion.
I wish the very best in your research. :)
Shannah TWISS
overthepond06@gmail.com
Canada