Surname Yustyn (Юстин 
, Иустин , Yustyn 
) , throughout the world, is a very rare family name. The last name Yustyn is habitual in Ukraine, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Kyrgyzstan. In absolute terms, this name is the most popular in Ukraine, Russia, and Kazakhstan. Also, Yustyn is the forename as well as the last name.