In 1830, the Williams family included six children and two slaves (a man older than 55 and a young woman between 19 and 23 years of age).
Williams became a member of the Virginia House of Delegates in 1829, and served one term as representative from Henrico County alongside Jacqueline B. Harvie.
Both times he was replaced by Robert A. Mayo (1799–1872), who a decade later became one of the founders of the Richmond and Henrico County Society for the Protection of Slave Property.
[3][4] Williams died on December 15, 1833, in Charleston, South Carolina en route to St. Augustine, Florida at just 37 years of age, leaving his widow to care for their six young children.
[5] A nephew of the same name, John Green Williams (1843–1922), became a Confederate soldier and courier for Gen. Jubal Early, and after the American Civil War, Commonwealth's Attorney for Orange County.