In the entire world, มนูญชัย (มนูญชัย 
, Manunchai , Manoonchai 
) is a very rare masculine given name. The forename มนูญชัย is habitual in South-eastern Asia, particularly Thailand, where it is a very rare male name. Also, มนูญชัย is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| มนูญชัย, Manunchai | Thailand |
| Manoonchai | Malaysia, United States, Thailand |
Mannoochai, and Manuthchai