Cognomen جوستاف (Gustav 
, Gustaf , Gustaaf 
) , globally, is quite a common surname. The surname جوستاف is habitual in Namibia, where it is quite a common surname, Cyprus, where it is quite a rare surname, and Sweden. Not in comparison with a country's population, it most frequently occurs in Indonesia, Spain, and Ghana. More frequently, جوستاف is the forename as well as the last name.