Surname Ugaya (Ugaya 
) , in the world, is a rare last name. The surname Ugaya is characteristic of Japan, where it is a very rare surname, Nigeria, and Brazil, where it is an extremely rare surname. In absolute terms, it is commonest in Japan, Nigeria, and India. Also, Ugaya is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ugaya | Japan, Philippines, Nigeria, India, Brazil |