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Globally, Senna (Senna , セナ , סנה , and others...) is quite a rare gender-neutral first name. The forename Senna is characteristic of Netherlands, where it is quite a rare gender-neutral name, Belgium, and Jamaica, where it is a rare masculine name. Measured by absolute frequency, it is commonest in Indonesia, Netherlands, and India. More prevalently, Senna is the last name as well as the forename.
Senna is also a name for the fictitious and mythical characters: Senna , the playable character from the game League of Legends.