Surname Rojanathanyakul (Rojanathanyakul 
) , globally, is a very rare family name. The cognomen Rojanathanyakul is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Rojanathanyakul | Thailand |
Kittiwat, Nicharee, and Danaichanok