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Cognomen Jader (Jader , جادر , Jáder ) , around the globe, is quite a common last name. The family name Jader is characteristic of Nicaragua, where it is quite a common surname, Kuwait, where it is quite a rare surname, and Iraq. In absolute terms, it is commonest in Nicaragua, Iraq, and Philippines. More prevalently, Jader is the forename as well as the last name.