Surname Ondem (Ondem 
) , in the world, is a very rare family name. The cognomen Ondem is habitual in Australia, where it is a very rare surname, Indonesia, and Philippines, where it is an extremely rare surname. Much less frequently, Ondem is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ondem | Philippines, Indonesia, Nigeria, Australia |