Last name Okena (Okena 
) , around the world, is a rare family name. The surname Okena is habitual in Japan, where it is a rare surname, Nigeria, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Also, Okena is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Okena | Japan, Nigeria, United States, India, Brazil |