Family name Saiyuen (Saiyuen 
) , in the entire world, is a very rare surname. The family name Saiyuen is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Saiyuen | Thailand |
Wanis, Yaowana, Suwaphat, Benjamas, and Panjamaporn