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Globally, 시나 (Cena , 시나 , Kippei ) is quite a common unisex first name. The forename 시나 is habitual in Hong Kong, where it is a rare masculine name, North Macedonia, where it is a rare girly name, and Israel, where it is a rare primarily female, but very infrequently boy's name. In absolute terms, it most frequently occurs in India, the Democratic Republic of the Congo, and the United States. More prevalently, 시나 is the last name as well as the forename.
시나 is also a name for the fictitious and mythical characters: Kippei Tachibana , the fictional character from The Prince of Tennis.