The Harvel Denton I see in Fayette County, Tennessee (1850, 1860) had a mother Lucinda/Lucy...? Is he a different guy?
In 1860 they are living next to John and Fadie "Stullions" -- perhaps that is Stallings?
UPDATE: In 1850 They are enumerated as John and Phada Stallings. It's very likely that these are Lucinda's/Lucy's parents.