Surname จันทร์ฤทัย (จันทร์ฤทัย 
, Janruthai , Junruechai ) , in the entire world, is a very rare cognomen. The cognomen จันทร์ฤทัย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, จันทร์ฤทัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| จันทร์ฤทัย, Janruthai, Junruechai, Junharuthai | Thailand |
Chanruechai, Chundruthai, and Janruechai