Throughout the world, Oian (Oian 
) is a rare gender-neutral forename. The forename Oian is habitual in Romania, where it is a rare unisex name, and Italy, where it is a very rare epicene name. Likewise, Oian is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Oian | Romania, United States, Italy, Brazil, Norway |