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In all the world, Krein (克林 , Kerin , Krein ) is a common dominantly boy's, but infrequently girly forename. The first name Krein is characteristic of China, where it is quite a rare primarily masculine, but scarcely female name, Nicaragua, where it is a rare dominantly female, but seldom boy's name, and Australia. In absolute terms, it is commonest in China, the United States, and Indonesia. Likewise, Krein is the last name as well as the forename.
Krein is also a name for the fictitious and mythical characters: .