Cognomen 柯阳 (柯阳 
) , in the entire world, is a very rare surname. The family name 柯阳 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 柯阳 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 柯阳 | China |