Cognomen Wichin (วิชิน 
, Wichin 
, วิจิน ) , all over the world, is a very rare family name. The surname Wichin is habitual in Thailand, where it is a very rare surname, Canada, where it is an extremely rare surname, and the United States. In absolute terms, it most frequently occurs in Thailand, China, and the United States. Predominantly, Wichin is the forename as well as the last name.