Hi Sharon,
It is not possible that William Pendarvis, son of William, and grandson of James Pendarvis is the William of Glynn Co., GA and later Nassau Co., FL. This poor William died on Feb 7, 1805 just after having turned of age. His grandfather and father had left him quite well off and according to court testimony by those that knew him, he had a problem with alcohol, gambling, and other personal indulgences. He never married (he was only 21 at death) and left as primary heir his only sister Ann Pendarvis Coburn. All of this can be found in the Charleston, SC District Equity Records among several different bills, petitions, and reports.
Randy