Surname ケイオウ (ケイオウ 
) , all around the world, is a very rare family name. The cognomen ケイオウ is habitual in Eastern Asia, particularly Japan, where it is a very rare surname. Also, ケイオウ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ケイオウ | Japan |