Cognomen อาฤทธิ์ (Arit 
, อาฤทธิ์ 
) , in the world, is a common last name. The last name อาฤทธิ์ is characteristic of Nigeria, where it is quite a rare surname, Philippines, where it is a rare surname, and Turkey. Measured by absolute frequency, it is commonest in Nigeria, Philippines, and Mexico. Also, อาฤทธิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Arit | Philippines, India, Mexico, Nigeria, Turkey |
| อาฤทธิ์ | Thailand |