Surname Ленуар (Lenoir 
, Ленуар 
) , throughout the world, is a common family name. The cognomen Ленуар is habitual in France, where it is quite a common surname, Belgium, and Mauritius, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in France, the United States, and Belgium. Very seldom, Ленуар is the forename as well as the last name.