found: Allgem. Künstlerlexocon, Bio-bibl. Index, 2000(Denis, Simon (Denis, Simon Joseph Alexander Clemens); b. Antwerp, Apr. 13 or 14, 1755; d. Naples, Jan 1, 1813; landscape painter)
found: Bénézit, 2006(Denis, Simon Joseph Alexander Clément, or Denys, called le Louche, also known as le Chevalier Denys; b. Antwerp, Apr. 14, 1755; d. Naples, Jan. 1, 1813)
found: Union list of artist names, May 8, 2008(Denis, Simon Alexandre Clement; Deny, Simon Alexandre Clement; Denys, Simon; Denys, Simon Alexandre Clement; b. 1755; d. 1812; Belgian painter)