Contesssa Ada d’Harcourt was Ada Rossi di Montelera (daughter of Conte Ernesto Rossi di Montelera and of Lydia Neumann) who married in 1923 Conte Alberto d’Harcourt di Fiano e d’Azeglio. Her father, besides being one of the owner of the firm Martini & Rossi, was an amateur rose breeder, very likely, acquaintance of Fratelli Giacomasso.