Family name Wachan (Wachan 
, วาจันทร์ ) , across the world, is a rare surname. The family name Wachan is habitual in Morocco, where it is a rare surname, Algeria, and Thailand, where it is a very rare surname. In absolute terms, it is the most numerous in Morocco, Algeria, and India. Very seldom, Wachan is the forename as well as the last name.