A famous bearer was the Cuban-French writer Anaïs Nin (1903-1977), known for her diaries.
This name was fairly common in France, England and the United States in the early 20th century. It became quite popular in France and England at the end of the 20th century, just when it was at a low point in the United States. It quickly climbed the American charts and entered the top ten in 2014.
Historically, the name was strictly masculine in France, but since at least the 20th century, it has also been used on women occasionally (as a diminutive of Michelle and Micheline). Its use as a feminine name is most often seen outside of the francophone world, such as in Flanders (Belgium) and the Netherlands.
Known bearers of this name include the French cabaret artist Michou (b. 1931; born as Michel Catty), the Réunion singer Michou (b. 1960; born as Marie-Christiane Ducap) and the Belgian World War II resistance fighter Micheline "Michou" Dumon (1921-2017).