French painter who was both the stepdaughter and the daughter-in-law of Claude Monet.
Blanche was the second daughter of Ernest Hoschedé and Alice Hoschedé. Ernest was a businessman, a department store magnate in Paris who went bankrupt in 1877. Ernest Hoschedé, Alice, and their six children moved into a house in Vétheuil with Monet, his wife Camille, and their two sons, Jean and the infant Michel. Ernest, however, spent most of his time in Paris, and eventually went to Belgium. After the death of Camille in Vétheuil on 5 September 1879, Alice and her children continued living with Monet. In 1881, they moved to Poissy, and finally settled in Giverny in 1883. Although Ernest and Alice Hoschedé never divorced, Claude Monet and Alice went on living together until after the death of Ernest in 1891. Claude Monet and Alice Hoschedé married on 16 July 1892.
Blanche began painting at the age of eleven and developed a fond relationship with Claude Monet. She visited his studio as well as Édouard Manet’s. By the time she was 17 years old, she was Monet’s assistant and only student, often painting en plein air alongside him, painting the same subject with the same colours.
Blanche married Claude Monet’s eldest son, Jean Monet, in 1897. The couple lived in Rouen, where Jean worked as a chemist for his uncle Léon Monet, and until 1913 in Beaumont-le-Roger.
Her mother, Alice, died on 19 May 1911, and Jean on 10 February 1914, after a long illness. Overcome with grief, Claude Monet suffered from depression and, from that point on, Blanche took over her father-in-law’s household. After Monet’s death on 5 December 1926, and for twenty years until her own death, she took on the responsibility of the house and gardens at Giverny. She died in Nice on 8 December 1947, aged 82.

Link to Wikipedia biography (French)