Surname Ronchaud (Ronchaud 
) , in all the world, is a rare family name. The cognomen Ronchaud is habitual in Western Europe, particularly France, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ronchaud | France |
|
louis nicod de ronchaud French art historian, archaeologist and historian, FR (b. 1816) |
|
| joseph-alexis nicod de ronchaud French politician, FR (b. 1781) |
|