Hope this doesn't send you on a wild goose chase.
There is a George Williams with grandsons Jesse Williams and James A.M. Muschett and a son John W. Williams. Will Book M, Prince Wm Co., pg. 494, 4 Oct 1825, Will.
There is a George Williams with sons Nathaniel Williams, wife Jane, sons Benjamin, George, daughter Margaret Ralls, son John Pope Williams, sons Jesse, Charles, granddaughter Lydia Beck Ralls. See The Lost Records Localities Digital Collection of the Library of Virginia, Surry County, Will of 31 Jan 1749/50