Muñiz
A Spanish patronymic surname meaning “son of Munio.”
The #1,147 most common surname in the United States (2010 Census) — about 1 in every 10,058 Americans shares it.
Etymology
Muñiz is a patronymic surname formed from the medieval personal name Munio, with the ending -iz/-ez meaning “son of” in old Iberian naming practice. In other words, it originally meant “descendant of Munio.” The older spelling without the tilde, Muniz, is a common simplified form, while Muñiz reflects the Spanish palatal sound.
History
The surname appears in medieval Iberian records, where patronymic forms were widely used and later became hereditary family names. It is especially associated with northern Spain and Portuguese-influenced spelling traditions, and it spread through Spanish-speaking migration to the Americas. The historical excerpts show it alongside other early patronymics such as Menéndez and Muñoz.
Origin
Regions
Variant spellings
Fun fact
The same medieval naming system that produced Muñiz also gave Spanish surnames like Muñoz and Menéndez, all built from a father's given name.
From the historical record
“sia de Mondoñedo : « Rodericus Menendiz, Gun- desindus Heroni, Lucidus Vimarani, Guter Menendiz , Arias Menendiz , Sarracinus Muniz, Theodoricus Lucidi, Lotarius Lucidi, Froila Odoariz.í) En el reinado de este Ordeño se generalizó el uso del apellido patronímico en los estados que”
— Ensayo histórico etimológico filológico sobre los apellidos castellanos