Cognomen Atthathammarat (Atthathammarat 
) , across the world, is a very rare last name. The surname Atthathammarat is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Atthathammarat | Thailand |
Sompong, Nongyao, Saibhaka, Naruebet, and Nuchchanat