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All over the world, Joslin (Joslin , جوسلين , Джослин) is a common dominantly male, but seldom female first name. The given name Joslin is characteristic of the Democratic Republic of the Congo, where it is quite a common masculine name, Singapore, where it is quite a rare girly name, and the Dominican Republic, where it is quite a rare mostly male, but seldom female name. Measured by absolute frequency, it is the most numerous in the Democratic Republic of the Congo, India, and the United States. Likewise, Joslin is the last name as well as the forename.