Joseph Bernheim-Jeune and Gaston Bernheim de Villers.

Joseph Bernheim-Jeune (1870-1941) and Gaston Bernheim de Villers (1970-1953) – art dealers, heirs to their father, the famous art dealer Alexandre Bernheim (1833-1915), who promoted the first generation of Impressionists, mainly Monet and Renoir, who were friends of the family. After 1900 the brothers supported and marketed Van Gogh, Cézanne and some of the Post-Impressionists, members of the Nabis group among them. Bonnard had his first one-man exhibition at their gallery in 1906; thereafter he exhibited annually until the First World War.
See also: Pierre-Auguste Renoir. Portrait of M. and Mme. Bernheim de Villers.
Bibliography:
Impressionism. Tashen. 1997