Cognomen Kasiev (Касиев 
, Kasiev 
) , all over the world, is a rare family name. The family name Kasiev is characteristic of Kyrgyzstan, where it is quite a rare surname, Azerbaijan, and Kazakhstan, where it is a rare surname. In absolute terms, this name is the most popular in Kyrgyzstan, Azerbaijan, and Russia. Very seldom, Kasiev is the forename as well as the last name.