Belgian mezzo-soprano Marianne Flahaut (1876-?) studied piano and singing at the Conservatoire in Liège. She then became the pupil of Désirée Padilla in Paris. Flahaut made her debut (1898) at the Paris Opéra as Amneris in Aida. Her other significant roles there were Fricka, Dalila, Erda (Siegfried), and Azucena (Trovatore). She participated in the first Paris Opéra performance (1899) of La Prise de Troie, which was a part of Berlioz's massive five-act opera, Les Troyens. Because of its length, the composer presented this massive five-act opera as two separate works, La Prise de Troie and Les Troyens a Carthage. Flahaut sang at the Metropolitan Opera from 1908-1911. Her Amneris was sung with a stellar cast consisting of Emma Eames, Antonio Scotti, and Enrico Caruso. She was also seen there as Lola (Cavalleria Rusticana), Maddalena (Rigoletto), Azucena, Fricka and Waltraute (Die Walküre), and First Norn (Götterdämmerung).Soprano Claire Friché (1875-1968) of the Opéra-Comique. She had a lyric voice with enough range to encompass both the mezzo and soprano roles. She was in several premieres at the Théâtre de la Monnaie and the Opéra-Comique, including the world premiere of Toinette du Chemineau. Austrian coloratura soprano, Hedwig [Hedi] Francillo-Kaufmann(Vienna: 20  Sep 1878 - Rio de Janeiro: 5 Apr 1948). She made her debut (1898) in Stettin. She sang successfully at the Munich Royal Opera, Berlin Imperial Opera, Komische Oper, Vienna Imperial Opera, Hamburg Opera, and in Wiesbaden. After World War II she married a Brazilian and emigrated to South America.Guerrina Febbri: Italian coloratura contralto (1868 - 21 Feb 1946): Debut Viadana (1884). Renowned for her coloratura singing in Cenerentola and L'Italiana in Algeri. London Drury Lane, Metropolitan Opera, Genoa. NOTE: She had a sister Vittorina who was a mezzo soprano. Vittorina had a much shorter career (1889-1895) so I'm reasonably certain this is an image of Guerrina and not Vittorina.
Edmée Favart: French soprano (1884-1940): A huge operetta star throughout France. However, that didn't prevent her from singing grand opera as well, appearing as Cherubino (Le Nozze), Rosenn (Le Roi d'Ys), Micaëla (Carmen), Mimi (La Boheme), and others such as the first Opéra-Comique Despina (Cosi Fan Tutte) in 1920. She took refuse in Marseilles during the war and died there.Swedish-American soprano Olive Fremstad (1871-1951). She sang the title role in Salome in the scandalous U.S. premiere of that work at the Metropolitan Opera in 1907. It was subsequently banned from the repertory and did not reappear at that house until 1934
German bass-baritone Emil Fischer (1838-1914) as Hans Sachs in Meistersinger, his most famous role. He made his debut (1857) in Graz as the Seneschal in Jean de Paris by Boieldieu. Fischer broke his contract in Dresden (1885) in order to join the Metropolitan Opera where he performed for seven seasons. His numerous U.S. premiere roles included, Bombardon (Das Goldene Kreuz), Demon (Merlin), High Priest (Fernand Cortez), Pedro (L'Africaine), Hans Sachs (Meistersinger), King Mark (Tristan und Isolde), Wotan (Rheingold), Abul Hassan (Der Barbier von Bagdad), Baron (Der Trompeter von Säkkingen), Lysiart (Euryanythe), the Wanderer (Siegfried), and Hagen (Götterdämmerung).German soprano Helena Forti (Berlin: 25 Apr 1884 - Vienna: 11 May 1942). She studied with Schiedemantel in Dresden and with Emmerich in Berlin. She made her debut (1906) at Dessau as Valentine in Les Huguenots. She appeared in Brünn, Prague, Dresden, Vienna, Berlin, Bucharest, Cologne, Brussels, and Amsterdam. In 1914 she appeared as Sieglinde at the Bayreuth Festival and was applauded as a first-rate Wagnerian.