What additional information, if any, do you have on John Barns Alexander who died in Henry County TN about 1830? I very much doubt that your John and mine are the same, but I also have a John Alexander (aged about 40) who died in--or left--that county in 1830 or shortly thereafter. My John had parents and six brothers who continued to live there, and I'm trying to put together a data base on all Alexanders of Henry County TN prior to 1850. I don't have extensive data yet except on some descendants of Matthew and Eleanor, but I'll share any of it.
Even a lead on how you know he ties to your family or where you got your information could be worthwhile in establishing genealogical lines.