Cognomen 尔文 (尔文 
, Erwen 
) , in all the world, is a rare last name. The last name 尔文 is habitual in China, where it is a very rare surname, Germany, and Nicaragua. Measured by absolute frequency, this name is the most popular in China, Germany, and the United States. More frequently, 尔文 is the forename as well as the last name.