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Worldwide, Yoi (Yoi , ยอย , ヨイ ) is quite a rare dominantly feminine, but uncommonly boy's given name. The first name Yoi is characteristic of Japan, where it is quite a rare female name, Thailand, where it is a rare unisex name, and Panama, where it is a rare girly name. Measured by absolute frequency, it most frequently occurs in Japan, Thailand, and Indonesia. Very seldom, Yoi is the last name as well as the forename.