Constance Mayer (Marie-Françoise-Constance Mayer-La Martinière) (March 9, 1775-May 26, 1821) was a French painter of portraits, allegorical subjects, miniatures, and genre works.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Constance_Mayer
Self-Portrait with Artist’s Father by Constance Mayer
1801 / Oil on canvas / 89″x70 1/2″ / Wadsworth Atheneum Museum of Art, Hartford, CT
Constance Mayer on Artnet:
Constance Mayer on French Ministry of Culture (Automatic translation by Reverso AI)
Constance Mayer-La Martinière (in German)