All around the world, 凱宇 (凱宇 
) is a very rare boy's forename. The forename 凱宇 is characteristic of Eastern Asia, particularly China, where it is an extremely rare male name. Very seldom, 凱宇 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 凱宇 | China |