Cognomen สวโรจน์ถิร (สวโรจน์ถิร 
) , in the world, is an extremely rare family name. The last name สวโรจน์ถิร is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| สวโรจน์ถิร | Thailand |