Surname Silawongsawat (Silawongsawat 
) , throughout the world, is a very rare last name. The family name Silawongsawat is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Silawongsawat | Thailand |
Chanpen, Jantana, and Phatarawadee