Nathalie-Marie-Thérèse Fantin-Latour was the daughter of the painter Jean-Théodore Fantin-Latour and Hélène de Naidenhoff, the adopted daughter of Countess Zoloff. She had two siblings, Ignace-Henri-Théodore, who became a painter and close friend of JW and Marie-Louise-Hélène.
In the spring of 1855 Henri destroyed a picture of Nathalie which he had intended to exhibit at the Universal Exhibition in Paris. In 1857 he drew a charcoal image of her sewing (Ashmolean Museum, Oxford). She also appears in the oil The Two Sisters (1859; Saint Louis City Art Museum). On 17 October 1859 she was committed to Charenton asylum, suffering from schizophrenia, where she remained until her death in 1903. Her brother supported her financially.
Druick, Douglas and Michel Hoog, Fantin-Latour, Paris, 1982.