Hi, I don't really have a clue (and I don't believe this is in my line), but William is in the 1860 census at age 30. William was born in Tennessee. I looked in 1840 census, although actual census was unavailable on line. Since in the 1860 census William was in Sullivan County, these are the names of the heads of household in 1840 Sullivan County, TN: Benjamin (on p.32), George (p.32) and Henderson (p.47). It could be that William named his son after his father (Henderson). I was hoping to get a gander at the census to see if Henderson had a son in about the age 10 bracket, which would give a little more info, although not precise. Good luck in your search. Lura