Last name Agustun (Agustun 
) , in all the world, is a very rare cognomen. The cognomen Agustun is characteristic of South-eastern Asia, particularly Indonesia, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Much less frequently, Agustun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Agustun | Philippines, Spain, United States, India, Indonesia |