Last name Kuyn (Куин 
, Kuyn 
) , all around the world, is a very rare family name. The surname Kuyn is habitual in Netherlands, where it is a rare surname, Malaysia, where it is a very rare surname, and Russia. In absolute terms, this name is the most popular in Netherlands, Russia, and the United States. Very seldom, Kuyn is the forename as well as the last name.