What nationality were Ida Georgina Moburg and Jean Sibelius?
Jean Sibelius Jean Sibelius ( ;    ), born Johan Julius Christian Sibelius (8 December 186520 September 1957), was a Finnish composer and violinist of the late Romantic and early-modern periods. He is widely recognized as his country's greatest composer and, through his music, is often credited with having helped Finland to develop a national identity during its struggle for independence from Russia.
Ida Gotkovsky Ida Rose Esther Gotkovsky (born 26 August 1933) is a French composer and pianist. She is currently a professor of music theory at the Conservatoire National Superieur de Musique in France.