Cognomen Wasei (Wasei 
) , all over the world, is a rare family name. The cognomen Wasei is characteristic of Ethiopia, where it is a very rare surname, New Zealand, and Nigeria, where it is an extremely rare surname. Also, Wasei is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wasei | Japan, Nigeria, Ethiopia, New Zealand, United States |