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Surname Sisko (Sisko , Сисько , Сиско ) , across the world, is quite a rare family name. The last name Sisko is habitual in Southern Europe, particularly Bosnia and Herzegovina, where it is quite a rare surname, Slovenia, and Serbia. Not in comparison with a country's population, it is the most numerous in the United States, Morocco, and Indonesia. Also, Sisko is the forename as well as the last name.