Cognomen Goulkan (Гулкан 
, Goulkan 
) , in the world, is a rare last name. The last name Goulkan is habitual in Kyrgyzstan, where it is quite a common surname, and South Africa, where it is a very rare surname. Also, Goulkan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Гулкан | Kazakhstan, Kyrgyzstan, Russia |
| Goulkan | South Africa |