Cognomen 성균 (성균 
, Seonggyun 
, Sung-Kyun ) , all over the world, is a very rare surname. The last name 성균 is characteristic of China, where it is an extremely rare surname, and the United States. Much more prevalently, 성균 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 성균 | South Korea |
| Seonggyun | South Korea, United States, China |
| Sung-Kyun | United States, China |