Pérez is principally a Spanish patronymic surname meaning “son of Pedro” or “son of Pero,” the medieval short form of Pedro. It describes how the name was formed, not a literal trait of its bearers and not one founding family. Many unrelated men could be identified through a father called Pedro or Pero, and their patronymics could later become hereditary surnames.
What Pérez Means
The Dictionary of American Family Names classifies Spanish Pérez as a patronymic from the personal name Pedro, the Spanish equivalent of Peter. “Descendant of Pedro” is a reasonable modern paraphrase, but “son of Pedro/Pero” is closer to the patronymic's original function. See the dictionary's Pérez entry.
The personal name has an older language history. Arranz Martín derives Spanish Pedro from Latin Petrus and describes medieval Pero as a vernacular form in which the d was lost; his documentary survey finds Pedro and Pero in the twelfth century, with Pero remaining in use into the sixteenth. See Arranz Martín, pp. 50–51. Whatever the remote etymology of the personal name, the surname itself directly denoted a relationship to a father called Pedro or Pero. It should not be presented as if it literally described a bearer as a “rock” or “stone.”
Before Pérez Was a Fixed Family Name
Modern readers can easily project today's inherited-surname system too far into the past. Jaime de Salazar y Acha's study of surnames in Spain describes a different medieval sequence. In the late ninth century, elite documentary formulas could give a person's name followed by the father's name in the Latin genitive and filius (“son”). Forms ending in -z then became characteristic of Romance patronymics. The practice spread more widely during the tenth and eleventh centuries. At that stage, a patronymic referred to the individual's actual father and could change in the next generation; it was not yet a permanent label for an entire family. Read Salazar y Acha, pp. 17–21.
Salazar y Acha places the emergence of names functioning as lineage labels from about the first half of the thirteenth century, while also emphasizing that Spanish surnames remained much less fixed than modern ones for centuries. In his account, the surname system had acquired roughly its present form by the early seventeenth century. Pérez can therefore occur in an early document as a genuine father-name description without proving that every later Pérez in the locality descended through an uninterrupted hereditary surname.
Medieval Forms and Linguistic Development
Severino Arranz Martín gives a more detailed philological reconstruction for Pérez. In his survey of medieval documentary spellings, he records Petrici in the eleventh century, Petriz in the eleventh and twelfth, Pedrez in the twelfth, and abundant Perez in the thirteenth. He also connects the final form with medieval Pero. His account treats these as stages in a linguistic development from Latin Petrus and its genitival formations, not as a chain of named ancestors. See Arranz Martín, *Etimologías inéditas y curiosas*, pp. 89–90.
These dated forms are useful evidence for spelling history, but they should not be converted into an “earliest Pérez family.” A medieval person written as Petriz, Pedrez, or Perez may show the development of the patronymic without belonging to the ancestry of any particular modern bearer.
Pérez, Perez, Peris, and Pires
In standard Spanish spelling, Pérez has an accent because the stress falls on the first syllable. Perez without the accent commonly represents the same Spanish surname in English-language records, indexes, and databases that omit diacritics. Searches for a Spanish-speaking family should usually check both forms. The Real Academia Española's general accentuation rule places a written accent on a word stressed on the penultimate syllable when it ends in a consonant other than n or s. See the RAE's general accentuation rules.
Similar Iberian surnames need more care. Salazar y Acha identifies Peris as the corresponding Valencian patronymic and Pires as the Portuguese form. They share the same underlying personal-name relationship, but that makes them regional cognates, not spellings that can be exchanged automatically in every family record.
The unaccented form Perez is also ambiguous outside a clearly Spanish context. The Dictionary of American Family Names separately records Breton Pérez as a form of Pérès and Jewish Perez as a form of Peretz. It also notes that some Sephardic families retained Spanish Pérez after ancestors adopted it on conversion to Catholicism. This does not make Pérez inherently Jewish or Sephardic. Salazar y Acha warns more broadly that an ordinary Spanish surname may be documented in a Jewish or converso family, but the surname alone cannot establish religious or ethnic ancestry. See Salazar y Acha, pp. 31–33.
Modern Distribution: What the Numbers Show
Pérez remains broadly distributed in Spain. The Spanish National Statistics Institute counted 779,313 people with Pérez as their first surname and 794,277 as their second surname in population data dated 1 January 2025; 25,085 had Pérez in both positions. Its province-of-birth table records first-surname bearers across every Spanish province listed, which fits a surname with many local family histories rather than a single exclusive homeland. View the INE Pérez table.
In the United States, the 2010 Census surname file reports PEREZ—without diacritics—as the 22nd most frequent surname, with 681,645 bearers. The same table classifies 93.0 percent of those bearers as Hispanic or Latino. These figures establish modern frequency in that census; they do not identify a particular family's country or region of origin. See the U.S. Census Bureau table, p. 7.
What the Surname Can and Cannot Establish
Pérez reliably points, in its primary Spanish origin, to a patronymic built from Pedro or Pero. It does not by itself identify which Pedro was involved, where a family first used the name, or whether two Pérez families share an ancestor. Early patronymics could change from one generation to the next, hereditary Pérez lines arose independently, and the same unaccented spelling can represent other language histories.
For the same reason, a modern concentration, a medieval bearer, or arms granted to one Pérez lineage cannot be assigned to all people with the surname. Genealogical conclusions require a documented chain between specific people; etymology explains the name's formation, not an individual's descent.
References
- Patrick Hanks and Simon Lenarčič, with Peter McClure, eds., Dictionary of American Family Names, 2nd ed., 5 vols. (Oxford University Press, 2022), “Perez” entry, reproduced by Ancestry.
- Jaime de Salazar y Acha, Génesis y evolución histórica del apellido en España (Real Academia Matritense de Heráldica y Genealogía, 1991), especially pp. 17–21 and 31–33, full text.
- Severino Arranz Martín, Etimologías inéditas y curiosas (Madrid: Editorial Verbum, 2005), pp. 50–51 and 89–90, publisher record.
- Real Academia Española and Asociación de Academias de la Lengua Española, Ortografía básica de la lengua española, “Reglas generales” for written accents, online edition.
- Instituto Nacional de Estadística (Spain), “Frecuencias de apellidos: PEREZ,” Censo anual de población at 1 January 2025, direct results table.
- Joshua Comenetz, Frequently Occurring Surnames in the 2010 Census (U.S. Census Bureau, October 2016), p. 7, PDF.