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Surname Jahu (Jahu , Яху ) , across the world, is a rare family name. The family name Jahu is habitual in Estonia, where it is quite a rare surname, Malaysia, where it is a rare surname, and France, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in India, Estonia, and Indonesia. More prevalently, Jahu is the forename as well as the last name.