Cognomen Lanchan (Lanchan 
, ลานจันทร์ ) , around the world, is a very rare family name. The surname Lanchan is characteristic of Thailand, where it is a very rare surname, Malaysia, where it is an extremely rare surname, and Argentina. Not in comparison with a country's population, this name is the most popular in Thailand, India, and Nigeria. Also, Lanchan is the forename as well as the last name.