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Last name Heihei (黑黑 , 嘿嘿 , Heihei ) , in the entire world, is a rare surname. The family name Heihei is habitual in Hong Kong, where it is a rare surname, New Zealand, and Australia, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Hong Kong, China, and New Zealand. More frequently, Heihei is the forename as well as the last name.