Family name Лан (Lan 
, Лан 
, Lông ) , across the world, is a widespread cognomen. The cognomen Лан 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). In absolute terms, it is commonest in China, Malaysia, and Vietnam. Much less frequently, Лан is the forename as well as the last name.