Family name มูอิ (Mui 
, มูอิ 
) , all over the world, is a common cognomen. The family name มูอิ is habitual in Macao, where it is quite a common surname, Malaysia, and Hong Kong (explore the name in all countries). In absolute terms, it is commonest in Malaysia, Hong Kong, and the United States. Likewise, มูอิ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mui | China, United States, Malaysia, Hong Kong, Taiwan |
| มูอิ | Thailand |