Surname Oliia (Олия 
, Олииа , Oliia 
) , all around the world, is a rare cognomen. The cognomen Oliia is characteristic of Kyrgyzstan, where it is quite a rare surname, Kazakhstan, where it is a very rare surname, and Russia, where it is an extremely rare surname. More prevalently, Oliia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Олия | Ukraine, Kazakhstan, Belarus, Russia, Kyrgyzstan |
| Олииа | Russia |
| Oliia | Brazil, Russia, United States, India |