Cognomen Кунай (Kunai 
, Кунай 
, Kunay 
) , around the world, is quite a common surname. The cognomen Кунай is characteristic of Papua New Guinea, where it is quite a rare surname, Belarus, and Slovakia. Measured by absolute frequency, it most frequently occurs in India, Papua New Guinea, and Belarus. Also, Кунай is the forename as well as the last name.