Family name Густин (Gustin 
, Gustyn 
, Густин 
) , across the world, is a common last name. The last name Густин is habitual in Belgium, where it is quite a common surname, Slovenia, where it is quite a rare surname, and Croatia. Not in comparison with a country's population, it is the most numerous in the United States, Indonesia, and France. Very seldom, Густин is the forename as well as the last name.