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