Cognomen เล่ย์ (Le 
, เล่ย์) , throughout the world, is a widespread last name. The family name เล่ย์ is characteristic of Mongolia, where it is a common surname, Vietnam, and Macao (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Vietnam, China, and the United States. Very seldom, เล่ย์ is the forename as well as the last name.