Cognomen 세형 (Sehyeong 
, 세형 , Sehyung 
) , in the world, is a very rare family name. The surname 세형 is habitual in China, where it is an extremely rare surname, and the United States. Much more frequently, 세형 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sehyeong | United States, South Korea |
| 세형 | South Korea |
| Sehyung | United States, South Korea, China |