Last name Кахая (Kahaja 
, Kahaia 
, Кахая 
) , in all the world, is a rare family name. The cognomen Кахая is characteristic of Czechia, where it is a rare surname, Georgia, and Malaysia, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Czechia, India, and Russia. Also, Кахая is the forename as well as the last name.