Cognomen Achuan (ชวน 
, Achuan 
) , in the world, is a rare last name. The family name Achuan is characteristic of Malaysia, where it is a rare surname, Peru, where it is a very rare surname, and Thailand. Not in comparison with a country's population, it is the most numerous in South-eastern Asia, particularly Malaysia, Thailand, and Indonesia. Predominantly, Achuan is the forename as well as the last name.