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Across the world, Kaido (Kaido
, Кайдо
, Каидо
) is a rare dominantly masculine, but infrequently feminine forename. The forename Kaido is habitual in Estonia, where it is quite a rare masculine name, Ethiopia, where it is a rare boy's name, and Indonesia, where it is a very rare boy's name. Not in comparison with a country's population, the name is most common in Ethiopia, India, and Indonesia. Much less frequently, Kaido is the last name as well as the forename.
Kaido is also a name for the fictitious and mythical characters: Kaido , the fictional character from One Piece.