Family name Langian (Belong 
, Langian ) , in the entire world, is quite a rare last name. The last name Langian is characteristic of Cameroon, where it is quite a rare surname, Philippines, where it is a rare surname, and Malaysia. Not in comparison with a country's population, it is commonest in Indonesia, Philippines, and Cameroon. Much less frequently, Langian is the forename as well as the last name.