An artist who succeeded in both commercial and fine arts, Gladys Rockmore Davis (May 11, 1901-February 16, 1967) gave up a career in advertising art to devote herself to creative painting.
Biography on Go Antiques: https://www.goantiques.com/gladys-rockmore-davis-541082

Seated Figure by Gladys Rockmore Davis
c.1937 / Oil on canvas / 30-1/16″x25″ / Pennsylvania Academy of the Fine Arts, Philadelphia, PA

Gladys Rockmore Davis on Artnet: http://www.artnet.com/artists/gladys-rockmore-davis/

Further reading:
https://www.dbdowd.com/illustration-history/2015/11/13/gladys-rockmore-davis
https://www.kilmerhouse.com/2015/07/gladys-rockmore-davis-the-artist-behind-the-classic-johnson-johnson-ads
LIFE magazine articles:
https://www.google.com/search?tbo=p&tbm=bks&q=Gladys+Rockmore+Davis&tbs=,bkt:m,bkms:1168684103302644245