Family name รถา (Ratha 
, รถา ) , around the world, is quite a common surname. The cognomen รถา is habitual in Sri Lanka, where it is quite a rare surname, Malaysia, and Kuwait. Measured by absolute frequency, it most frequently occurs in India, Sri Lanka, and Malaysia. Likewise, รถา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ratha | Sri Lanka, India, Cambodia, Malaysia, Thailand |
| รถา | Thailand |