Family name Jongkasem (Jongkasem 
) , in all the world, is an extremely rare last name. The family name Jongkasem is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, Jongkasem is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jongkasem | Thailand |