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Worldwide, Açu (Açu ) is an extremely rare unknown gender forename. Much more prevalently, Açu is the last name as well as the forename.
Asu
Emre, Ayşe, Aysun, Burak, Mehmet, Renato, Juliel, Fatima, Ferhat, Flavio, Socorro, Hati Ce, and Süleyman