Last name Gustáv (Gustav 
, Густав 
, Gustáv 
) , all over the world, is quite a common family name. The surname Gustáv is characteristic of Namibia, where it is quite a rare surname, Cyprus, and Israel. Not in comparison with a country's population, this name is the most popular in Indonesia, Ghana, and Spain. More frequently, Gustáv is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gustav | Czechia, South Africa, Sweden, Austria, Germany |
| Густав | Ukraine, Estonia, Kazakhstan, Lithuania, Russia |
| Gustáv | Slovakia, Hungary |