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All around the world, 海尼 (Heini , Haynie , 海尼 ) is quite a rare mostly male, but seldom feminine first name. The given name 海尼 is characteristic of Finland, where it is quite a rare female name, Germany, where it is quite a rare boy's name, and Switzerland. Likewise, 海尼 is the last name as well as the forename.
海尼 is also a name for the fictitious and mythical characters: Heini , the operatic character in the opera Wenn die kleinen Veilchen blühen.