Family name Gilles-Yann (Gilles-Yann 
) , in the world, is an extremely rare cognomen. Much more frequently, Gilles-Yann is the forename as well as the last name. Parts of the name also exists independently as a first name Gilles, and a first name Yann.
| VARIANT | COUNTRY |
|---|---|
| Gilles-Yann | France |