Last name Unsun (Unsun 
, Унсун 
) , across the world, is a very rare family name. The last name Unsun is characteristic of Kyrgyzstan, where it is a rare surname, Denmark, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. In absolute terms, it is the most numerous in Kyrgyzstan, Denmark, and Turkey. More frequently, Unsun is the forename as well as the last name.