Maximilienne Guyon (May 24, 1868-1903) was a French painter, watercolorist, printmaker, and illustrator.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Maximilienne_Guyon

Young Girl Leaning by Maximilienne Guyon
Before 1897 / Oil on canvas / 32-1/3″x25-3/5″ / Musée de La Roche-sur-Yon, France

Maximilienne Guyon on Artnet: http://www.artnet.com/artists/maximilienne-goepp-guyon/

More links:
https://www.mutualart.com/Artist/Maximilienne-Goepp-Guyon/0290B3A6DF5414E5/Artworks
http://arcadiasystems.org/academia/cassatt11b.html#guyon
https://translate.google.com/translate?sl=auto&tl=en&u=https://fr.wikipedia.org/wiki/Maximilienne_Guyon