Family name יוסטין (Jostein 
, יוסטין 
) , in all the world, is a rare last name. The surname יוסטין is habitual in Norway, where it is a rare surname, Indonesia, and Israel, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Indonesia, Norway, and Spain. More frequently, יוסטין is the forename as well as the last name.