Family name Gucas (Gucas 
) , around the world, is a very rare cognomen. The family name Gucas is habitual in Lithuania, where it is quite a rare surname, and Argentina, where it is an extremely rare surname. Very seldom, Gucas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gucas | Argentina, Nigeria, Lithuania |