Cognomen 柯森 (Colson 
, 柯森 
, Curson 
) , around the world, is a common family name. The surname 柯森 is habitual in New Zealand, where it is quite a common surname, Belgium, and Luxembourg, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in the United States, France, and Belgium. Much less frequently, 柯森 is the forename as well as the last name.