Surname 冈冈 (冈冈 
) , all over the world, is a very rare last name. The last name 冈冈 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 冈冈 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 冈冈 | China |