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Across the world, 시언 (Sheehan , 시언 ) is a rare unisex forename. The given name 시언 is characteristic of South Korea, where it is a rare unisex name, Australia, where it is a very rare gender-neutral name, and Morocco, where it is a very rare feminine name. Not in comparison with a country's population, the name is most common in South Korea, Indonesia, and the United States. Much more prevalently, 시언 is the last name as well as the forename.