Cognomen Iustic (Iustic 
) , across the world, is a very rare family name. The last name Iustic is characteristic of Croatia, where it is a very rare surname, Italy, and Germany, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Italy, Germany, and France. Also, Iustic is the forename as well as the last name.