Surname Muiy (Muiy 
) , worldwide, is a very rare cognomen. The family name Muiy is habitual in Indonesia, where it is a very rare surname, India, where it is an extremely rare surname, and the United States. Much less frequently, Muiy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Muiy | India, United States, Indonesia |