Family name 勒 (Le 
, 勒 ) , in all the world, is a widespread cognomen. The family name 勒 is habitual in Mongolia, where it is a common surname, Vietnam, and Macao (explore the name in all countries). In absolute terms, it most frequently occurs in Vietnam, China, and the United States. Very seldom, 勒 is the forename as well as the last name.