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In the entire world, ديو (Deo , Deu , Dio ) is a widespread unisex first name. The first name ديو is habitual in the Democratic Republic of the Congo, where it is quite a common gender-neutral name, Tanzania, where it is quite a common male name, and Indonesia, where it is quite a common principally masculine, but very infrequently female name. Measured by absolute frequency, it is the most numerous in India, Indonesia, and the Democratic Republic of the Congo. Likewise, ديو is the last name as well as the forename.
ديو is also a name for the fictitious and mythical characters: Dio Brando , the fictional character from JoJo's Bizarre Adventure.