Last name Sayasan (Sayasan 
) , in the entire world, is a very rare family name. The last name Sayasan is characteristic of the United States, where it is an extremely rare surname, Thailand, and Philippines. In absolute terms, this name is the most popular in the United States, India, and Thailand. Also, Sayasan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sayasan | Thailand, United States, India, Philippines |