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All over the world, Cero (Sierra , Sero , Cero ) is a common dominantly feminine, but seldom male forename. The forename Cero is habitual in Guam, where it is quite a common feminine name, the United States, and Georgia, where it is quite a rare gender-neutral name. Not in comparison with a country's population, this name is the most popular in the United States, Ethiopia, and Indonesia. More frequently, Cero is the last name as well as the forename.
Cero is also a name for the fictitious and mythical characters: Sierra , the fictional character in Dollhouse; Sierra , the character from 2008 film 'Camp Rock'; Sierra , the character from 2015 film 'Bad Hair Day'; Sierra Ripoche and Sierra Esteban , character in As the World Turns.