Surname Decollonge (Decollonge 
) , in the world, is a very rare last name. The family name Decollonge is habitual in Western Europe, particularly France, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Decollonge | France |
| jean-roland decollonge French politician, FR (b. 1952) |
|