Family name Остан (Austan 
, Ostan 
, Остан 
) , all around the world, is quite a rare surname. The family name Остан is habitual in Slovenia, where it is quite a rare surname, Philippines, and Italy, where it is a rare surname. Not in comparison with a country's population, the name is most common in Philippines, Italy, and Brazil. Much less frequently, Остан is the forename as well as the last name.