Giuseppe Kaschmann (14 Jul 1850 - 7 Feb 1925): Italian baritone: First studied law, then singing with Alberto Giovanni. Debut (1876) in Turin as Alfonso in la Favorita. Performed in Spain, Portugal, La Scala, Teatro Costanzi, Metropolitan Opera, Covent Garden, St. Petersburg, Moscow, Monte Carlo, Cairo, Teatro Colon (Buenos Aires), Bayreuth, Rio de Janeiro. Austrian contralto Hermine Kittel (2 Dec 1879 - 7 Apr 1948). She studied singing with Amalie Materna in Vienna. She made her debut in Ljubljana (1897). She appeared at the Vienna Hofoper under Gustav Mahler, the Salzburg Festivals, and at the Bayreuth Festivals in 1902 and 1908.Tenor Lev Klementyev (1868-1910). He began his career in operetta and then grand opera during his days at the Kiev Opera and Moscow's Bolshoi Theatre. He was especially admired in the title role of Rubinstein's Nero, not particularly for his singing but rather for the way he interjected his own real pretensions and irremissible behavior into the character. Klementyev died at the height of his power from peritonitis that could have responded to surgery. Instead, he went ahead with a concert performance that cost him his life.
Paul Knüpfer (1865-1920) as Gurnemanz in Parsifal. He spent most of his career at the Berlin Imperial Opera where he was a noted buffo bass. He sang Baron Ochs in the Berlin premiere of Der Rosenkavalier. He often performed with his wife, soprano Maria Knüpfer-Egli.German tenor Ernst Kraus (1863-1941). Early in his career Kraus toured the United States with the Damrosch Opera Company. He appeared at the Metropolitan Opera during the 1903-04 season, and at Covent Garden. This handsome tenor was the leading tenor for twenty-seven years at the Berlin Opera. He made his debut (1893) in Mannheim as Tamino in Zauberflöte.German tenor Heinrich Knote (1870-1953) as Siegfried. He made his debut (1892) as Georg in Der Waffenschmied at the Munich Royal Opera. He began in buffo roles but quickly developed the heroic tenor voice for which he was noted. As a member of the Metropolitan Opera (1904-08), he appeared in Götterdämmerung, Königin von Saba, Siegfried, Lohengrin, Tannhäuser, Tristan und Isolde, Der Zigeunerbaron, Meistersinger, Fliegende Holländer, and Trovatore.
Hilde Konetzni. Austrian soprano (Vienna: 21 Mar 1905 - Vienna: 20 Apr 1980). She studied at the Vienna Conservatory initially. Two years after her sister, Anny, made her debut, Hilde made her debut in Chemnitz as Sieglinde at the same theater. Both she and her sister specialized in German roles and even performed together on occasion. Hilde was especially popular in Vienna.Austrian soprano Anny Konetzni (12 Feb 1902 - Vienna: 6 Sep 1968). She studied in Vienna under Erik Schmedes and in Berlin with Stückgold. She made her debut (1927) in Chemnitz. She sang primarily in Berlin, Vienna, and London. Her Metropolitan Opera debut occurred in 1934 as Brünnhilde in Die Walküre. Anny's sister, soprano Hilde Konetzni, enjoyed a highly successful career.