Surname Oader (Oader 
) , in all the world, is a very rare last name. The last name Oader is habitual in Colombia, where it is a very rare surname, China, where it is an extremely rare surname, and the United States. Also, Oader is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oader | Brazil, China, Colombia, United States |