Last name Gamuya (Gamuya 
) , in the world, is a rare surname. The surname Gamuya is habitual in Tanzania, where it is a rare surname, Philippines, where it is an extremely rare surname, and the United States. Very seldom, Gamuya is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gamuya | Tanzania, Nigeria, United States, Philippines, India |