Surname หลั่น (Lan 
, หลั่น) , around the world, is a widespread last name. The family name หลั่น is characteristic of Malaysia, where it is a common surname, Macao, and Vietnam, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, it is commonest in China, Malaysia, and Vietnam. Very seldom, หลั่น is the forename as well as the last name.