Cognomen Kuiš (Куиш 
, Kuiš 
) , in the entire world, is a very rare surname. The cognomen Kuiš is characteristic of Belarus, where it is a rare surname, Croatia, and Kyrgyzstan, where it is a very rare surname. Measured by absolute frequency, it is commonest in Russia, Belarus, and Croatia. Very seldom, Kuiš is the forename as well as the last name.