Last name Undia (Undia 
) , around the world, is a rare surname. The cognomen Undia is characteristic of Indonesia, where it is a very rare surname, Philippines, and Nigeria, where it is an extremely rare surname. Very seldom, Undia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Undia | Philippines, India, Nigeria, United States, Indonesia |