Last name Tonasa (Tonasa 
) , worldwide, is a rare surname. The surname Tonasa is habitual in South-eastern Asia, particularly Indonesia, where it is a very rare surname, and Thailand, where it is an extremely rare surname. Much less frequently, Tonasa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tonasa | Philippines, India, United States, Indonesia, Thailand |