Last name 柯西 (Corsi 
, Cauchy 
, Couch ) , in the world, is a common family name. The family name 柯西 is habitual in Italy, where it is quite a common surname, Belize, and the United States, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in the United States, Italy, and France. Very seldom, 柯西 is the forename as well as the last name.