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Last name Heintz (Heintz , היינץ , 海因茨) , worldwide, is a common cognomen. The cognomen Heintz is characteristic of Western Europe, particularly Luxembourg, where it is quite a common surname, France, where it is quite a rare surname, and Germany. Not in comparison with a country's population, this name is the most popular in the United States, Germany, and France. Much less frequently, Heintz is the forename as well as the last name.