Surname 冈 (Gun 
, 冈 , 강 
) , worldwide, is a widespread cognomen. The cognomen 冈 is habitual in South Korea, where it is a widespread surname, Malaysia, where it is quite a common surname, and Mongolia, where it is quite a rare surname. In absolute terms, it is the most numerous in South Korea, China, and Indonesia. Much less frequently, 冈 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gun | India, China, Mongolia, Malaysia, Indonesia |
| Gāng, 冈 | China |
| 강 | South Korea |