Cognomen Gustys (Gustys 
) , in all the world, is a rare family name. The last name Gustys is characteristic of Northern Europe, particularly Lithuania, where it is quite a common surname, Norway, where it is a rare surname, and the United Kingdom, where it is an extremely rare surname. Much less frequently, Gustys is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gustys | United Kingdom, Norway, Canada, United States, Lithuania |
| rokas gustys Lithuanian basketball player (1994-), LT (b. 1994) |
|