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Cognomen Koci (Koci , كوجى , Кочи ) , in all the world, is a common family name. The surname Koci is characteristic of Albania, where it is a common surname, Czechia, where it is quite a common surname, and Kosovo (explore the name in all countries). Measured by absolute frequency, the name is most common in Albania, Czechia, and Greece. Very seldom, Koci is the forename as well as the last name.