Family name ระทา (Ratha 
, ระทา ) , around the world, is quite a common cognomen. The last name ระทา is habitual in Sri Lanka, where it is quite a rare surname, Malaysia, and Kuwait. In absolute terms, this name is the most popular in India, Sri Lanka, and Malaysia. Also, ระทา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ratha | Thailand, India, Sri Lanka, Cambodia, Malaysia |
| ระทา | Thailand |