Family name Moonsook (Moonsook 
) , around the globe, is a very rare cognomen. The family name Moonsook is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much more frequently, Moonsook is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Moonsook | Thailand, United States, South Korea, Canada |