>
Cognomen Jaak (جاك , Jaak , Яак ) , in all the world, is quite a rare family name. The surname Jaak is habitual in Sudan, where it is quite a rare surname, Libya, and Syria. Measured by absolute frequency, it is commonest in Sudan, Egypt, and Iraq. More prevalently, Jaak is the forename as well as the last name.
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