Cognomen Eakthierrat (Eakthierrat 
) , worldwide, is a very rare surname. The last name Eakthierrat is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Eakthierrat | Thailand |
Phuththawin, Kisjanaphat, and Nattasasi