Cognomen キヨオカ (キヨオカ 
, Kiyooka 
) , in the world, is a very rare family name. The cognomen キヨオカ is characteristic of Canada, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. Much more frequently, キヨオカ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| キヨオカ | Japan |
| Kiyooka | China, Brazil, Canada, United States, Japan |