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Cognomen Kajava (Kajava
, Каява
) , around the world, is a rare last name. The cognomen Kajava is characteristic of Northern Europe, particularly Finland, where it is quite a rare surname, Sweden, where it is a rare surname, and Estonia. Measured by absolute frequency, it is the most numerous in Finland, India, and Sweden. Very seldom, Kajava is the forename as well as the last name.