Family name Karpai (Karpai 
, Карпай 
) , in the world, is a very rare cognomen. The cognomen Karpai is habitual in Kyrgyzstan, where it is a very rare surname, Ukraine, and Russia, where it is an extremely rare surname. In absolute terms, this name is the most popular in India, Russia, and Ukraine. More frequently, Karpai is the forename as well as the last name.