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All over the world, Osa (Osa , オサ , Оса ) is a common epicene given name. The first name Osa is habitual in Egypt, where it is quite a rare epicene name, Libya, and Ethiopia. Measured by absolute frequency, it most frequently occurs in India, Egypt, and Indonesia. Likewise, Osa is the last name as well as the forename.
Osa is also a name for the fictitious and mythical characters: Osa , the musical character in the musical A Little Night Music by Stephen Sondheim; maid at Madame Armfeldt's manse.