Joseph Mann was mentioned in the 4 September 1804 will of her mother, Sarah Mann, proved 15 October 1804. He was named executor, but renounced his right to executorship of the estate. [Essex County, Virginia, Will Book 16, pages 308–309.]

Joseph Mann Senior was mentioned in the 30 December 1817 will of his nephew, Townley Banks, proved on 16 February 1818. [Essex County, Virginia, Will Book 18, pages 471–472.]