Who dated Mathilde de Morny?

Mathilde de Morny (26 May 1863 – 29 June 1944) was a French aristocrat and artist. She was also known by the nickname "Missy" or by the artistic pseudonym "Yssim" (an anagram of Missy), or as "Max", "Uncle Max" (French: Oncle Max), or "Monsieur le Marquis". Active as a sculptor and painter, Morny studied under Comte Saint-Cène and the sculptor Édouard-Gustave-Louis Millet de Marcilly.

Sidonie-Gabrielle Colette (French: [sidɔni ɡabʁijɛl kɔlɛt]; 28 January 1873 – 3 August 1954), known mononymously as Colette or as Colette Willy, was a French author and woman of letters. She was also a mime, actress, and journalist. Colette is best known in the English-speaking world for her 1944 novella Gigi, which was the basis for the 1958 film and the 1973 stage production of the same name. Her short story collection The Tendrils of the Vine is also famous in France.