Family name Ruaz (Ruaz 
) , all over the world, is a rare surname. The last name Ruaz is characteristic of Portugal, where it is a rare surname, France, and Switzerland, where it is a very rare surname. In absolute terms, this name is the most popular in France, Portugal, and Italy. Very seldom, Ruaz is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ruaz | Portugal, Italy, Switzerland, United States, France |
| emile louis de ruaz French painter, FR (b. 1868) |
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| dominique ruaz French politician, FR (b. 1954) |
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