Gorgeous name. It is the name of French author and former Louis Vuitton exec, Mireille Guiliano. I have also seen the name used in Latin America, albeit rarely, and pronounced Mee-REH-yeh.
Mireille Darc is a French model and actress. She was Alain Delon's longtime co-star and companion. She appeared as a lead character in Jean-Luc Godard's 1967 film Week End.
If anyone has taken French in the last few years, Mireille is one of the characters in the dreaded series "French in Action." Apparently, the actress was also a former porn-star (oh my!).
I have also seen the name used in Latin America, albeit rarely, and pronounced Mee-REH-yeh.