Surname カヤ (Kaya 
, カヤ 
) , all around the world, is a prevalent cognomen. The cognomen カヤ is habitual in Turkey, where it is a prevalent surname, the Democratic Republic of the Congo, where it is a common surname, and Cyprus, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, it is commonest in Turkey, the Democratic Republic of the Congo, and India. Much less frequently, カヤ is the forename as well as the last name.