Surname Sihyun (Sihyun 
) , around the world, is a rare last name. The family name Sihyun is habitual in South Korea, where it is a rare surname, Malaysia, where it is a very rare surname, and Cambodia. Measured by absolute frequency, the name is most common in South Korea, Malaysia, and China. More prevalently, Sihyun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sihyun | China, India, Malaysia, United States, South Korea |