Last name 柯竣 (柯竣 
) , in the entire world, is a very rare cognomen. The surname 柯竣 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 柯竣 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 柯竣 | China |