Surname Ruchan (รุจน์ 
, Ruchan 
) , around the world, is a rare family name. The cognomen Ruchan is characteristic of Indonesia, where it is a very rare surname, Turkey, where it is an extremely rare surname, and China. In absolute terms, it is the most numerous in Indonesia, China, and India. More frequently, Ruchan is the forename as well as the last name.