Cognomen มณีจันทร์ (มณีจันทร์ 
, Manichan 
, Maneechan 
, among others...) , in all the world, is quite a rare last name. The last name มณีจันทร์ is characteristic of Thailand, where it is quite a rare surname, Malaysia, where it is a very rare surname, and South Africa. In absolute terms, it is commonest in Thailand, India, and Malaysia. Likewise, มณีจันทร์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Maneejun, มณีจันทร์ | Thailand |
| Manichan | Laos, Malaysia, Thailand, United States, India |
| Maneechan | Laos, Malaysia, Thailand, United States, Canada |
| Maneejan | United Kingdom, Malaysia, Thailand, United States, India |
Manchan, Manechan, Maneechanate, Maneechane, Maneechant, Maneejuntr, Manewjan, Manichane, Manichanh, Manichanun, Manijan, and Manijun