Family name Lãa (Lan 
, Lãa 
) , in the world, is a widespread cognomen. The surname Lãa 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, Lãa is the forename as well as the last name.