Wertheim, Rosy [Rosalie] (Marie)
- Helen Metzelaar
(b Amsterdam, Feb 19, 1888; d Laren, May 27, 1949).Dutch composer. After gaining a piano teaching certificate in 1912 from the Koninklijke Nederlandse Toonkunstenaars Vereniging, she studied composition with Bernard Zweers and Sem Dresden. She also taught the piano and solfège at the Amsterdam Muzieklyceum. Deeply concerned about the social circumstances of the working classes, she gave piano lessons to poor children, conducted a children’s chorus in a working-class neighbourhood and financially supported a number of families. She also conducted the Jewish women’s chorus of the Religieus Socialistisch Verbond in Amsterdam. During World War I her song ...