Surname Ratsirajirakul (Ratsirajirakul 
) , in all the world, is a rare last name. The last name Ratsirajirakul is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ratsirajirakul | Thailand |
Puwasit, Pongprera, Ratsarin, Pongpeera, and Patcharaporn