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In all the world, איסאק (Isac , איסאק , Isaác ) is a common male given name. The first name איסאק is habitual in Brazil, where it is quite a common boy's name, Moldova, where it is quite a rare male name, and Sweden. Not in comparison with a country's population, this name is the most popular in Brazil, Mexico, and the Democratic Republic of the Congo. Very seldom, איסאק is the last name as well as the forename.