Last name Tonchia (Tonchia 
) , all over the world, is a rare surname. The cognomen Tonchia is characteristic of Croatia, where it is a rare surname, Italy, and France, where it is a very rare surname. Very seldom, Tonchia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tonchia | Italy, United States, France, Croatia, South Africa |