Surname Jajun (Jajun 
, Яйун 
) , all around the world, is a very rare cognomen. The family name Jajun is characteristic of Malaysia, where it is a very rare surname, Philippines, and Nigeria, where it is an extremely rare surname. In absolute terms, it most frequently occurs in India, Philippines, and Malaysia. More frequently, Jajun is the forename as well as the last name.