Cognomen Hamasu (Hamasu 
) , globally, is a rare family name. The surname Hamasu is habitual in Paraguay, where it is quite a rare surname, Nigeria, where it is a very rare surname, and the United States, where it is an extremely rare surname. Also, Hamasu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hamasu | Paraguay, Nigeria, United States, India, Brazil |