Surname ริทธิ์ (Rit 
, ริทธิ์ 
) , worldwide, is a common cognomen. The surname ริทธิ์ is characteristic of Malaysia, where it is quite a rare surname, Albania, and Myanmar. Not in comparison with a country's population, it is the most numerous in India, Malaysia, and Myanmar. Likewise, ริทธิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rit | Myanmar, India, Indonesia, Malaysia, Algeria |
| ริทธิ์ | Thailand |