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All over the world, Josko (Josko , جوسكو) is a rare male given name. The first name Josko is habitual in Croatia, where it is quite a rare male name, Slovenia, where it is a rare male name, and Germany, where it is a very rare masculine name. Measured by absolute frequency, the name is most common in Croatia, Germany, and Indonesia. Much less frequently, Josko is the last name as well as the forename.