Last name รตะโรจน์กุล (รตะโรจน์กุล 
) , around the globe, is an extremely rare cognomen. The cognomen รตะโรจน์กุล is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| รตะโรจน์กุล | Thailand |