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In all the world, Nassau (Nass , Nassau , ناسو ) is quite a common gender-neutral forename. The first name Nassau is habitual in Algeria, where it is quite a rare gender-neutral name, Mauritius, and Libya, where it is quite a rare largely masculine, but uncommonly feminine name. In absolute terms, the name is most common in Algeria, Nigeria, and Cameroon. More prevalently, Nassau is the last name as well as the forename.
Nassau is also a name for the fictitious and mythical characters: .