Family name Муй (Mui 
, Mooy 
, Муй 
) , around the globe, is a common last name. The family name Муй is characteristic of Malaysia, where it is quite a common surname, Macao, and Hong Kong (explore the name in all countries). Not in comparison with a country's population, the name is most common in Malaysia, Hong Kong, and Indonesia. Also, Муй is the forename as well as the last name.