Meaning of the surname Núñez
Núñez is a Spanish surname of the patronymic type meaning "son of Nuño". It is one of the 200 most common surnames in Mexico.
About this meaning. The etymology is uncertain or the popular reading is folk etymology. The page gives the best-supported explanation.
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 Núñez appears as either half of a pair: Núñez García, López Núñez. Read how the two-surname system works.