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Around the world, Ngoan (เงิน , Ngoan , Нгоан) is quite a rare unisex forename. The first name Ngoan is habitual in Macao, where it is quite a common female name, Israel, where it is quite a rare unisex name, and Thailand. Not in comparison with a country's population, this name is the most popular in Thailand, Vietnam, and Israel. Also, Ngoan is the last name as well as the forename.