Meaning of the surname Díaz
Díaz is a Spanish surname of the patronymic type meaning "son of Diego". It is one of the 50 most common surnames in Mexico. Eighteenth in Mexico. Porfirio Díaz ruled Mexico for three decades.
Formed from a father's given name with the suffix -ez, -es, or -iz, meaning 'son of'. Hernández is the son of Hernando, Martínez the son of Martín. About half of the most common Mexican surnames are patronymics.
In Mexico a person carries two surnames, the father's and then the mother's, so Díaz appears as either half of a pair: Díaz García, López Díaz. Read how the two-surname system works.