Last name Кейхан (Kayhan 
, Keihan 
, Keyhan 
) , throughout the world, is a common family name. The family name Кейхан is characteristic of Turkey, where it is quite a common surname, Afghanistan, where it is quite a rare surname, and Sweden. In absolute terms, this name is the most popular in Turkey, Japan, and Afghanistan. Much less frequently, Кейхан is the forename as well as the last name.