Marie-Gabrielle Capet (September 6, 1761-November 1, 1818) was a French Neoclassical painter and a pupil of Adelaide Labille-Guiard.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Marie-Gabrielle_Capet

Portrait of Baroness Dannery Holding her Son Jean Germain Samuel in Her Arms by Marie-Gabrielle Capet
ND / Gouache on ivory / 5-1/3″x3-3/4″ / Private collection

Marie-Gabrielle Capet on Artnet: http://www.artnet.com/artists/marie-gabrielle-capet/

Further reading:
http://www.artinsociety.com/forgotten-women-artists-3-marie-gabrielle-capet-stepping-out-from-the-shadows.html
https://collection.nmwa.go.jp/en/P.2001-0002.html
https://www.journal18.org/issue8/gabrielle-capets-collective-self-portrait-women-and-artistic-legacy-in-post-revolutionary-france/