Mick, I believe the parents of the James Sneed who married Mary Agnes Stone were Allen Sneed and Ann Bomar.Here is what I have:
Allen Sneed b. in VA about 1801, died after 1860, probably in Enterprise, Maury Co TN, married Ann Bomar, b. in VA about 1805, on August 15, 1825 in Halifax Co VA. They moved to Enterprise, Maury Co TN in 1830/31.Their children were:
Mary Ann Sneed b VA September 1, 1826, d. March 12, 1905, married James Campbell Daniels on June 11, 1846. (My line) Lucy Sneed b VA abt 1830, married Benjamin F. Kennedy on August 20, 1850, in Williamson Co TN. John Allen Sneed b. TN abt 1831, died in Civil War on May 20, 1864, married Lavinia Lindsey, b. May 1, 1833, in Maury Co TN on November 2, 1858. Nancy Sneed b. TN abt 1833. Katherine "Minerva" Sneed b. TN abt 1837. James Sneed, b. TN abt 1839, married Mary A. Stone on May 3, 1862. Coley Sneed b. TN abt 1841. Margaret "Marzee" Sneed, b. TN abt 1845, married Jackson Thomason on June 11, 1865.
The Sneeds in Giles Co TN are decendents of aJames Sneed (m. Celia Elizabeth Sandusky on May 15, 1855 in Giles Co) and Pleasant Allen (P.A.O) Sneed (m. Rosanna Sandusky on December 13, 1855 in Giles Co).Both are buried in the Croates Creek Cemetary west of Pulaski.I believe their parents were James Henderson "Henly" Sneed, b. abt 1803, and Martha Patsy Gorman, b. abt 1807, who lived in Cocke Co TN.Both were born in Halifax Co VA.
It is possible that Henly and Allen were brothers, but I have been unable to establish a connection.I also do not know who Allen Sneed's parents were or where he was born.Ann Bomar may have been the Ann Bomar who was the daughter of John "LongJohn" Bomar and Catherine Powell of Halifax Co VA, but again, I have been unable to establish the connection. Let me know if your can clarify any of this.