Cognomen Omban (Omban 
) , worldwide, is a rare last name. The surname Omban is habitual in Philippines, where it is a rare surname, Indonesia, where it is a very rare surname, and India, where it is an extremely rare surname. Very seldom, Omban is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Omban | Indonesia, Philippines, India |