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In all the world, 刀 (Dao , 刀 , Katana ) is a common epicene forename. The first name 刀 is habitual in Macao, where it is quite a common epicene name, Vietnam, where it is quite a rare gender-neutral name, and Laos, where it is quite a rare female name. In absolute terms, it most frequently occurs in Vietnam, China, and India. More prevalently, 刀 is the last name as well as the forename.
刀 is also a name for the fictitious and mythical characters: Katana , the DC Comics character, Suicide Squad; Katana , the fictional character in the 1991 film Highlander II: The Quickening; Katana , the fictional character in animated television series ''Blackstar''; Katana , the operatic character in the operetta Die Geisha, The Geisha and Katana , the musical character in the musical The Geisha by Sidney Jones; captain of the guard.