Last name Кастан (Castan 
, Casten 
, Кастан 
) , all around the world, is a common cognomen. The family name Кастан is habitual in France, where it is quite a rare surname, Spain, and Mexico. Very seldom, Кастан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Castan | Spain, Philippines, Mexico, United States, France |
| Casten | Spain, Philippines, Mexico, United States, Argentina |
| Кастан | Ukraine, Russia |
| Castán | Spain, Mexico, United States, Argentina, Brazil |