Thomas Harris and Mary Wilson were married in Augusta, VA, on 25 Jan 1816 and had a son called William, who was born in 1841 and married Finetta G Walker.
The most concrete thing I have found is Smyth County, VA, death record:
SCV: WILLIAM HARRIS, WHITE MALE, WIDOWER OF FINATTIE HARRIS, NO DOB, D. APR 1925, 83Y 9M 5D, S/O THOMAS HARRIS, SCV & MARY WILSON, SCV (MARION)
http://genforum.genealogy.com/harris/messages/22689.html
