Cognomen ז'אן-קלוד (Jean-Claude 
, ז'אן-קלוד 
) , all around the world, is quite a common family name. The last name ז'אן-קלוד is characteristic of Monaco, where it is quite a common surname, Luxembourg, where it is quite a rare surname, and Haiti. Measured by absolute frequency, it most frequently occurs in France, the United States, and Ivory Coast. Much more frequently, ז'אן-קלוד is the forename as well as the last name. Parts of the name also exists independently as a first name ז'אן, and a first name קלוד.