The following website mentions John Willcox as the partner of John Livingston Hadley's grandfather,Thomas Hadley.
"John Livingston Hadley's grandfather, Thomas Hadley was killed by Tories during the Revolutionary War. Thomas moved to Virginia from London Grove MM, Chester, Pennsylvania shortly after his marriage to Mary Thompson in June of 1750. He did not remain in Virginia long. In 1760, he with a partner, John Wilcox, were the first merchants of Cross Creek in Cumberland Co., North Carolina. He represented his district at the Constitutional Convention at Halifax, NC. in November 1776, which enacted a Bill of Rights for the new government. He was elected sheriff of Cumberland Co, NC in 1778, and re-elected in 1781, but was killed before he could serve his last term."
A place to gather and share information about the Thomas Willcox and Elizabeth Cole Willcox Family of Ivy Mills, PA. For more information see the Home page link above or contact Deniane Kartchner at Denianek@gmail.com. My husband is a descendant of Thomas and Elizabeth's son James who married Prudence Doyle. Their son John's daughter Prudence married John Christopher Kartchner.
Note: This is a work in progress! I am trying to verify everything before I post, but feel free to send me corrections and/or suggestions. It’s also not a complete history of Ivy Mills or a website for current operations, although I will gladly try to answer any questions and/or lead you to the right information.