Family name Кайна (Kaina 
, Kayna 
, Кайна 
) , worldwide, is quite a rare surname. The family name Кайна is habitual in Morocco, where it is quite a rare surname, Papua New Guinea, and Cameroon, where it is a rare surname. In absolute terms, it most frequently occurs in Morocco, the United States, and India. Likewise, Кайна is the forename as well as the last name.