French composer Jacques Ibert (5 letters) and Jacques Offenbach (9 letters) were both influential figures in the world of classical music. Ibert was a 20th century French composer who wrote works for orchestra, chamber music, opera, and ballet. He was also a conductor and a pianist. Offenbach was a 19th century German-born French composer known for his operettas and other light operas. He is credited with popularizing the genre of operetta and is considered one of the most important composers of the Romantic era.