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