Surname Serafyn (Серафин 
, Serafyn 
) , in all the world, is a rare family name. The cognomen Serafyn is habitual in Eastern Europe, particularly Ukraine, where it is a rare surname, Bulgaria, and Russia, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Ukraine, Russia, and the United States. Very seldom, Serafyn is the forename as well as the last name.