Gustav Lange (1830 – 1889) was a German composer known mainly for his melodious salon music for the piano. Wikipedia Not to be confused with the Norwegian composer, Gustav Fredrik Lange.
Johann Adolph Hasse (1699–1783) was an 18th-century German composer, singer, and teacher of music. Immensely popular in his time, Hasse was best known for his prolific operatic output, though he also composed a considerable quantity of sacred music. Wikipedia
Marie Jaëll née Marie Trautmann (1846 – 1925) was a French pianist, composer, and pedagogue. Marie Jaëll composed pieces for piano, concertos, quartets, and others. She dedicated her cello concerto to Jules Delsart, and was the first pianist to perform all the piano sonatas of Beethoven in Paris. Wikipedia
Maurice Rollinat (1846-1903) was a French poet and musician. Wikipedia