Cognomen Odious (Odious 
, Odiar 
) , in all the world, is a very rare family name. The cognomen Odious is habitual in South Africa, where it is a very rare surname, Nigeria, where it is an extremely rare surname, and Philippines. Measured by absolute frequency, it is the most numerous in South Africa, India, and Nigeria. Likewise, Odious is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Odious | Malaysia, United States, India |
| Odiar | South Africa, Nigeria, Philippines, India, China |