JADLOWKER, HERMANN (1878–1953), tenor. Born in Riga, Jadlowker began his operatic career in Cologne in 1889. Invited to Berlin in 1901, he sang at the Berlin State Opera for five years and in 1910 made his U.S. debut at the Metropolitan Opera, New York. Among his important roles were the Prince in the world premiere of Engelbert Humperdinck's Koenigskinder (1910), and Florindo in Ermanno Wolf-Ferrari's Le Donne curiose in its first U.S. performance in 1912. He returned to Berlin in 1913, was cantor in Riga from 1929 to 1938, and then settled in Tel Aviv as a voice teacher.