 His son Fernand Gregh (1873–1960) was a philosopher, literary critic and poet, member of the Académie française.Gregh registered as a music publisher with SACEM in February 1873 after having bought the catalogue of the Parisian publisher Claude Heu.He grew by acquiring, by auction, parts of the dissolved publishers Léon Escudier (1882), Egrot (1884), and Jochem (1899).