Surname Moonsung (Moonsung 
) , throughout the world, is a very rare last name. The surname Moonsung is habitual in Thailand, where it is a very rare surname, and China, where it is an extremely rare surname. More prevalently, Moonsung is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Moonsung | Canada, Thailand, United States, South Korea, China |