Family name Yong-Hyun (용현 
, Yong-Hyun 
) , globally, is an extremely rare cognomen. Much more frequently, Yong-Hyun is the forename as well as the last name. Parts of the name also exists independently as a first name Yong, and a last name Hyun.
| VARIANT | COUNTRY |
|---|---|
| 용현 | South Korea |
| Yong-Hyun | Canada, South Korea, United States |
Yong-Hyeon, and ヨンヒョン