E. M. Sperling. Catalogue of a Loan Exhibition of Flemish Primitives. Exh. cat., F. Kleinberger Galleries, Inc., New York. New York, 1929, p. 168, no. 79, ill., erroneously identifies this portrait with one lent to the Royal Academy, London, 1873, no. 174; the latter measures 6 5/8 x 5 in.
Anne Dubois de Groër. Corneille de La Haye dit Corneille de Lyon. Paris, 1996, pp. 210–11, no. 122, ill., notes that the costume is contemporary with confirmed portraits of Antoine de Bourbon, but feels the differences in the coiffure and features as compared with these portraits (see e.g. Dubois de Groër no. 54) cast doubt on our sitter's traditional identification.