Cognomen 劳恩 (Laun 
, Lown 
, Rauen 
) , all over the world, is quite a common surname. The surname 劳恩 is habitual in Luxembourg, where it is quite a rare surname, Germany, and Australia, where it is a rare surname. Measured by absolute frequency, this name is the most popular in the United States, Germany, and Brazil. Much less frequently, 劳恩 is the forename as well as the last name.