Worldwide, Katnu (Katnu 
) is a very rare mostly male, but seldom girly first name. The forename Katnu is characteristic of Southern Asia, particularly India, where it is an extremely rare mostly male, but infrequently female name. Very seldom, Katnu is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Katnu | India, Thailand |