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In all the world, Jaak (جاك , Jaak , Яак ) is quite a common boy's given name. The first name Jaak is characteristic of Estonia, where it is quite a common male name, Belgium, where it is quite a rare masculine name, and Syria. Measured by absolute frequency, it most frequently occurs in Egypt, Algeria, and Iraq. Very seldom, Jaak is the last name as well as the forename.
Jaak is also a prevalent name for the fictitious and mythical characters: Jack Bauer , the character from the television series 24; Jack Reacher , the fictional character, Jack Reacher; Captain Jack Sparrow , the fictional character and the protagonist of the Pirates of the Caribbean film series, Pirates of the Caribbean: On Stranger Tides; Jack Harkness , the fictional character of Doctor Who and Torchwood and Jack O'Neill , the fictional character from the Stargate universe, and in many other works.
Bout, Rakfeldt, Rutten, Drijkoningen, Geboers, Jansen, Jacobs, Tarien, Hickey, Sanders, Rannik, Peeters, Jurison, Trekhaak, Van Rie, Wouters, Monbaliu, Kerkhofs, Gorissen, Janssens, Verheyen, Janssen, Karner, Bollen, Albert, Boon, Kukk, Gits, Neve, Enno, Haas, Vilo, Moons, Claes, Praet, Põder, Gelay, Leroy, Järv, Jõgi, Troch, Harju, Simons, Segers, Schetz, Smeets, Wassmuth, and Vermeiren