Last name อรรถรัตน์ (อรรถรัตน์ 
, Attarat , Atarat 
) , in the world, is a rare cognomen. The surname อรรถรัตน์ is characteristic of Thailand, where it is a rare surname, and India, where it is an extremely rare surname. More prevalently, อรรถรัตน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| อรรถรัตน์, Attarat, Attharat | Thailand |
| Atarat | Pakistan, India, Thailand |