Berta Teodora Concordia Önnerberg (1886–1980), Sweden
Music teacher and composer. Learned to play the piano at age five; later trained at the conservatory in Stockholm. She was the first woman affiliated with the Swedish collective management organization STIM (in 1923) and was a founding member of the Swedish Association of Composers of Popular Music (SKAP). She wrote many light pieces for piano and voice and for dance and salon orchestra.