Meaning of the surname Pacheco
Pacheco is a Portuguese surname of the patronymic type meaning "uncertain". It is one of the 200 most common surnames in Mexico. Etymology uncertain.
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 Pacheco appears as either half of a pair: Pacheco García, López Pacheco. Read how the two-surname system works.