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Family name Dozen (Dozen , 打 , Tá ) , in all the world, is a common last name. The last name Dozen is characteristic of Japan, where it is quite a common surname, China, where it is quite a rare surname, and Algeria, where it is a rare surname. Not in comparison with a country's population, it is commonest in Japan, China, and Indonesia. Much less frequently, Dozen is the forename as well as the last name.