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Around the world, 澄夫 (Sumio , 澄夫 ) is quite a common predominantly feminine, but very seldom boy's given name. The first name 澄夫 is characteristic of Japan, where it is quite a rare girly name, Afghanistan, where it is a rare masculine name, and the United States, where it is an extremely rare mostly male, but seldom girly name. Not in comparison with a country's population, it is commonest in Japan, Afghanistan, and China. Very seldom, 澄夫 is the last name as well as the forename.