Cognomen Duclos-Montagne (Duclos-Montagne 
) , worldwide, is an extremely rare family name. The surname Duclos-Montagne is characteristic of Western Europe, particularly France, where it is an extremely rare surname. Parts of the name also exists independently as a last name Duclos, and a last name Montagne.
| VARIANT | COUNTRY |
|---|---|
| Duclos-Montagne | France |