Isaac JACKSON (c.1625 - c.1701) His estate was inventoried in Essex County, Virginia in 1701. Sources: "Virginia Wills and Administrations, 1632-1800", p.227, Clayton Torrence, Richmond, VA. 1930. 1990. Tinsley genealogical notes, charts and letters of Nell Blumel, Ocala, FL. 1997.