Surname สิวายุ (สิวายุ 
) , around the globe, is a very rare family name. The family name สิวายุ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, สิวายุ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สิวายุ | Thailand |