Cognomen Douste-Blazy (Douste-Blazy 
) , globally, is a very rare family name. The cognomen Douste-Blazy is habitual in Western Europe, particularly France, where it is a very rare surname. Parts of the name also exists independently as a last name Douste, and a last name Blazy.
| VARIANT | COUNTRY |
|---|---|
| Douste-Blazy | France |
|
philippe douste-blazy French politician, FR (b. 1953) |
|
| louis douste-blazy FR (b. 1921) |
|