Surname Yongkul (Yongkul 
) , all over the world, is a very rare family name. The surname Yongkul is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, Yongkul is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yongkul | United States, Thailand |