From Roster of South Carolina Patriots in the American Revolution:
"Riddell, William Powell
He served in an independent company of militia during 1780. A.A.6407A;L 177; Z631."
William brought suit agains his two brothers, according to theChronicl es of the Scotch-Irish in VA:
22d June, 1784. William Powell Riddle to Jacob Peck, power of attorneyt o prosecute a suit in General Court against James and Lewis Riddle,of O range County, executor of William Riddle, deceased, for his partof sai d estate; also a negro that I left with my father, and
all estate left by me or my father to me in Orange County.