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