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Cognomen Hiwa (Hiwa ) , worldwide, is quite a common surname. The surname Hiwa is habitual in Iraq, where it is quite a common surname, Malawi, where it is quite a rare surname, and Norway, where it is a rare surname. Measured by absolute frequency, the name is most common in Iraq, Malawi, and Indonesia. Also, Hiwa is the forename as well as the last name.