Cognomen In Yong (In Yong 
) , in the entire world, is a very rare family name. The family name In Yong is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, In Yong is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| In Yong | Chile, China, South Korea, United States |