Family name קוסון (Koson 
, קוסון 
) , around the world, is quite a rare cognomen. The surname קוסון is characteristic of Laos, where it is quite a rare surname, Japan, and Poland, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Japan, Thailand, and Poland. Likewise, קוסון is the forename as well as the last name.