Family name Беркай (Berkay 
, Беркай 
) , in all the world, is a rare last name. The family name Беркай is habitual in Turkey, where it is a rare surname, Bulgaria, and Kyrgyzstan, where it is a very rare surname. Measured by absolute frequency, it is commonest in Turkey, Germany, and Bulgaria. Much more prevalently, Беркай is the forename as well as the last name.