Marguerite Roesgen-Champion

Marguerite Sara Roesgen-Champion (24 January 1894 – 30 June 1976) was a Swiss composer, pianist and harpsichordist who used the pseudonym Jean Delysse. She composed works for orchestra, harpsichord and piano, as well as chamber and choral works. As a pianist she performed several piano concertos by Mozart and Haydn. On harpsichord she performed compositions for harpsichord by Jean-Henry d'Anglebert and Johann Christoph Friedrich Bach.