Worldwide, Adain (Adain 
) is a rare principally masculine, but very seldom feminine first name. The first name Adain is habitual in Panama, where it is a rare masculine name, the Democratic Republic of the Congo, and Mexico, where it is a rare mostly male, but infrequently girly name. In absolute terms, this name is the most popular in the Democratic Republic of the Congo, Mexico, and Peru. Likewise, Adain is the last name as well as the forename.