Usage

Usage
Díaz and the angelicized form Diaz appear to be surnames only, without evidence for use as given names. Use of Díaz may arise through Anglicization of Portuguese language Dias, as in the case of Bartolomeu Dias.
Many examples of the surnames Díaz exist among historically notable people as a patronymic of Diego. Among the earliest such examples is El Cid, whose real name as Rodrigo Díaz de Vivar, and whose father's given name was Diego (Catholic Encyclopedia 1913).
There is at least one instance of use as a single name, the former Norwegian rap artist Diaz, who was born to a Spanish father and Norwegian mother; his birth name was "Andrés Rafael Díaz".[citation needed]

- from http://en.wikipedia.org/wiki/Diaz

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