Family name อัฒ (Attha 
, อัฒ 
) , in all the world, is a rare cognomen. The last name อัฒ is habitual in Indonesia, where it is a very rare surname, Nigeria, and Thailand, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Indonesia, Nigeria, and India. More frequently, อัฒ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Attha | Pakistan, India, Indonesia, Nigeria, China |
| อัฒ | Thailand |