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Worldwide, Costin (Costin , Constantinus , Костин ) is quite a common primarily masculine, but very seldom female forename. The first name Costin is habitual in Romania, where it is quite a common principally boy's, but scarcely female name, Moldova, where it is quite a rare male name, and the Democratic Republic of the Congo, where it is a rare masculine name. Measured by absolute frequency, this name is the most popular in Romania, the Democratic Republic of the Congo, and Indonesia. More prevalently, Costin is the last name as well as the forename.