Here is a clue sent to me by another researcher
"On the 22nd April 1756, Francis Reynolds was appointed Administrator of the estate of John Reynolds, deceased. Edward Hughes and JOHN HARMAN were bondsmen. This document was found in the file C.R. 104.508 (NC Archives), Wilkes County Estate Records. It does not have the the name of the county on the printed form, but in 1756 the area of Wilkes was then Rowan county NC."
and from another source-
Quoting from "Carolina Cradle, Settlement of the NW NC Frontier
1747-1762", by Robert W. Ramsey, UNC Press, 1964. (Available
from Amazon.com, but I bought mine a2 years ago at B&N),
Page 83: "In addition to the Forbush, Howard, Winsuit, and Sparks
families, at least five of the initial pioneers north of the South Yadkin
[river] originated in Maryland....... JOHN HARMON evidently originated
either in New Castle County [Delaware] or in Talbot County, Maryland.
[Note] 111: Delaware Land Records, Hall of Records, Dover, Del:
New Castle Reference H/1,no 59; Testamentary Proceedings, liber 1,
folio 105; Rowan Deeds, V, 91.
Page 131: "A number of other settlers of English, Irish, and Welsh
derivation represented a mixture of Quaker, Baptist, Anglican, and
Catholic antecedents. They were ....JOHN HARMON [among about
25 listed names].
The Chapter heading where page 83 is says: In The Forks of the Yadkin,
1752-1762. The South Yadkin R. is the boundary line between present
day Rowan and Davie Counties. This whole area was Rowan Co until
1771 when Surry was formed which emcompassed what is now
Yadkin Co. If I'm not mistaken, the HARMON land was in the vicinity
s.e. of Yadkinville on Harmon Creek (still named that).
Have you found out anything further about Rebecca's ancestry?