Surname รัตนวิชญ์ (รัตนวิชญ์ 
, Rattanawic , Rattanavich 
) , throughout the world, is an extremely rare last name. The cognomen รัตนวิชญ์ is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Also, รัตนวิชญ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| รัตนวิชญ์, Rattanawic | Thailand |
| Rattanavich | Thailand, United States |