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In the world, Carvallo (Carballo , Carvalho , Carvallo ) is quite a rare gender-neutral first name. The forename Carvallo is characteristic of Luxembourg, where it is quite a common epicene name, Portugal, where it is quite a rare gender-neutral name, and Angola, where it is quite a rare dominantly masculine, but seldom feminine name. Measured by absolute frequency, the name is most common in Angola, Portugal, and Brazil. Much more frequently, Carvallo is the last name as well as the forename.
Carvallo is also a name for the fictitious and mythical characters: .