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Cognomen Jax (Jax , 贾克斯 , جاكس ) , around the world, is quite a rare surname. The family name Jax is habitual in Guatemala, where it is quite a rare surname, Bahrain, and Austria. Not in comparison with a country's population, it is commonest in Guatemala, Germany, and Indonesia. Also, Jax is the forename as well as the last name.