Around the world, Decottignies-Gillet (Decottignies-Gillet 
) is an extremely rare unknown gender first name. Much more prevalently, Decottignies-Gillet is the last name as well as the forename. Parts of the name also exists independently as a last name Decottignies, and a last name Gillet.
| VARIANT | COUNTRY |
|---|---|
| Decottignies-Gillet | France |