Surname Sungnul (Sungnul 
) , in the entire world, is an extremely rare family name. The surname Sungnul is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sungnul | Thailand |
| surattana sungnul Ph.D. Suranaree University of Technology 2006 |
|