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