All around the world, Tonnu (Tonnu 
) is a very rare mostly boy's, but seldom girly first name. The first name Tonnu is habitual in Southern Asia, particularly India, where it is an extremely rare mostly masculine, but infrequently girly name. More frequently, Tonnu is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Tonnu | Australia, United States, India, Canada, Vietnam |