Surname จันทรฤทัย (จันทรฤทัย 
, Jantharuthai , Juntaruthai ) , in all the world, is a very rare cognomen. The cognomen จันทรฤทัย is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Juntaruthai, จันทรฤทัย, Jantharuthai | Thailand |