A significant sculptor who died prematurely. Duchamp and Villon were his brothers, and fellow-organisers of the Puteaux group, a Sunday discussion group for artists including the painters Picabia, Gris, Léger, Delaunay, Gleizes, Metzinger and Kupka, and the sculptor Archipenko. Boccioni was a personal friend and almost certainly an influence on his sculptural work. Villon shared the same house; Kupka lived next door.