I find the Pinyon/Pinion variation definitively associated with a Reuben PENNEL of North Carolina, whose son identified himself as Reuben Wilson Pinion/Pinyan, a resident of Union Co. NORTH Carolina.
Reuben PENNEL's wife was Lydia.
In the same veteran's file (transcribed): "...Benjamin Pennel (who is often called Benjamin Penion) appeared before me William Lenoir a Justice of the Peace of said County and solemnly made Oath in due form of Law that he by the best account he can obtain at this time [is] about 63 years old and that in the time of the Cherokee Indian war he lived with his Father in Surry County, North Carolina, and that this Deponent well Remembers that h[e ]is Brother Reuben Pennel..."
https://revwarapps.org/w5519.pdf