Cognomen Kaân (Каян 
, Kaân) , in the world, is a rare last name. The last name Kaân is habitual in Armenia, where it is quite a common surname, Belarus, where it is quite a rare surname, and Ukraine, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Armenia, Ukraine, and Russia. Much less frequently, Kaân is the forename as well as the last name.