Cognomen Ducoste-Refuse (Ducoste-Refuse 
) , in all the world, is an extremely rare family name. The last name Ducoste-Refuse is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Ducoste.
| VARIANT | COUNTRY |
|---|---|
| Ducoste-Refuse | United States |