Cognomen ฤกษ์ทวีสุข (ฤกษ์ทวีสุข 
, Reukthawisuk, Ruekthawisuk ) , in the entire world, is a very rare family name. The cognomen ฤกษ์ทวีสุข is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ruekthawisuk, ฤกษ์ทวีสุข | Thailand |