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Around the globe, بای (Bay , Baj , Bayh ) is a common unisex first name. The first name بای is habitual in Mongolia, where it is quite a rare epicene name, Macao, where it is quite a rare girly name, and Tunisia, where it is quite a rare gender-neutral name. Not in comparison with a country's population, it is the most numerous in India, Indonesia, and Pakistan. Likewise, بای is the last name as well as the forename.
بای is also a name for the fictitious and mythical characters: Bay Ganyo , the fictional character.