Surname Châtain (Шатен 
, Chastaigne 
, Châtain ) , across the world, is a rare last name. The surname Châtain is habitual in Martinique, where it is a common surname, Kyrgyzstan, where it is a rare surname, and France, where it is a very rare surname. Much less frequently, Châtain is the forename as well as the last name.