In the entire world, 도이 (Doi 
, 도이 
) is quite a rare unisex first name. The given name 도이 is habitual in Israel, where it is quite a rare epicene name, Vietnam, where it is a rare principally boy's, but very seldom girly name, and Tanzania, where it is a rare unisex name. Measured by absolute frequency, it is commonest in Vietnam, India, and Indonesia. Likewise, 도이 is the last name as well as the forename.