Check the Rowan County library for a book titled, "Wendel Miller and His Descendents 1730-1986". I know there is a copy at the Stanly County library. The Miller descendents live in both counties.
Wendel Miller had a son, Frederick Miller b. 11-11-1756 d. 1-1-1840 married 5-10-1779 to Margaret Braun b. 1758 in Salisbury, Rowan Co, NC d. 4-6-1845 in Jefferson Co, KY.
If you do not find a copy email me & I will send you a copy of what I have on Frederick Miller.