Cognomen หลั่ย (Lai 
, หลั่ย) , in the world, is a widespread surname. The surname หลั่ย is habitual in Hong Kong, where it is a prevalent surname, Macao, where it is a widespread surname, and Bermuda (explore the name in all countries). Measured by absolute frequency, it is the most numerous in China, Malaysia, and Hong Kong. Very seldom, หลั่ย is the forename as well as the last name.