Surname Gacien (Gacien 
) , globally, is an extremely rare last name. The cognomen Gacien is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Much more prevalently, Gacien is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gacien | United Kingdom, United States, France, Brazil, Democratic Republic of the Congo |