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