Cognomen Olownia (Olownia 
) , throughout the world, is a rare family name. The cognomen Olownia is habitual in Poland, where it is a rare surname, the United States, where it is an extremely rare surname, and the United Kingdom. Also, Olownia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Olownia | Poland, United Kingdom, Canada, United States |