Last name Сейхун (Сейхун 
, Seyhoun 
) , all over the world, is an extremely rare surname. The cognomen Сейхун is characteristic of Kyrgyzstan, where it is a very rare surname, Canada, where it is an extremely rare surname, and Ukraine. In absolute terms, the name is most common in Kyrgyzstan, the United States, and Canada. Likewise, Сейхун is the forename as well as the last name.