Cognomen Sumanja (Sumanja 
) , all over the world, is a very rare family name. The last name Sumanja is habitual in South-eastern Asia, particularly Indonesia, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Very seldom, Sumanja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sumanja | Brazil, India, Indonesia, Philippines |