Family name Oloan (Oloan 
) , all over the world, is quite a rare last name. The surname Oloan is characteristic of South-eastern Asia, particularly Indonesia, where it is a rare surname, Singapore, and Philippines. Not in comparison with a country's population, it most frequently occurs in Indonesia, Philippines, and the United Kingdom. Likewise, Oloan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oloan | Philippines, United Kingdom, United States, Singapore, Indonesia |