Surname Katvalyan (Катвалян 
, Katvalyan 
) , worldwide, is a rare last name. The cognomen Katvalyan is habitual in Armenia, where it is quite a rare surname, Russia, where it is a rare surname, and Ukraine, where it is a very rare surname. More frequently, Katvalyan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Катвалян | Armenia, Russia, Ukraine |
| Katvalyan | Armenia, United States, Russia |