I am looking for the same person. Alex died Aug. 10, 1810 in Knox County. Check out the Book A, Knox County 1801-1842
and you can see the legatees.
Jane Benson Campbell was married to Jeremiah Shelly.
John Campbell was married to Usley Corley and had several sons, James, Alexander, John, etc.
James married Lucy Howard and eventually moved to Searcy County, Ark.