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In all the world, Yai (Yai , Яи , ไหย่) is a common unisex forename. The forename Yai is habitual in Mongolia, where it is quite a rare unisex name, Japan, where it is quite a rare feminine name, and Ethiopia, where it is quite a rare largely boy's, but uncommonly feminine name. Measured by absolute frequency, this name is the most popular in Japan, India, and Ethiopia. Likewise, Yai is the last name as well as the forename.