Family name Бизяк (Bizjak 
, Бизяк 
) , in the entire world, is quite a rare surname. The surname Бизяк is characteristic of Southern Europe, particularly Slovenia, where it is a common surname, Montenegro, where it is quite a common surname, and Croatia, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Slovenia, the United States, and Croatia. Very seldom, Бизяк is the forename as well as the last name.