Family name Thouas (Thouas 
) , in all the world, is a very rare surname. The last name Thouas is habitual in Greece, where it is a rare surname, New Zealand, and Australia, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Greece, Australia, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Thouas | Australia, Canada, Greece, New Zealand, United States |