Trejo

surname · Latin script

Recorded for both men and women· direction only, no split published

/trɛxo/(machine-generated) pronunciation, model-generated

Trejo is a surname written in the Latin script, with more bearers in the United States than in any other country. In Mexico it is the 77th most common surname. Recorded meaning: Habitational surname borrowed from Spanish Trejo.

rarermore common
  • SVEl Salvador≈1 in 876(inferred from the name graph)
  • HNHonduras≈1 in 1.2K
  • VEVenezuela≈1 in 2.2K

carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). One hue, darker where it is more common; hover a country for its figure.

United States (measured from records)

41,021 people, 2010

#978 (measured from records)

of 19M surnames

Sources
373 (measured from records)

Highest-authority source

≈1 in 876 (inferred from the name graph)

El Salvador, est.

measured from records inferred from the name graph

Name dossier (print, CSV)

Meaning & origin(measured from records)

Habitational surname borrowed from Spanish Trejo.

Sources 1

Where in the world(measured from records)

Trejo counted together with the spellings and other-language forms grouped with it. Where a register counted another spelling, the row names it.

Sorted by bearers: national registers' counts, and Mondonomo's estimates (≈, est.) where no register counts.

Where Trejo is recorded, by country
CountryMost common spellingSources
US United States—41,0211 in 8.1K41KTrejo373
AR Argentina#35517,6791 in 2.6K18KTrejo92
VE Venezuela#341≈13,000 est.≈1 in 2.2K—Trejo58
HN Honduras#149≈7,700 est.≈1 in 1.2K—Trejo33
SV El Salvador#146≈7,400 est.≈1 in 876—Trejo49
EC Ecuador#8614,4761 in 3.8K4.5KTrejo37
MX Mexico#77——4.5KTrejo228

41,021 people counted by Census Bureau — Surname Frequency 2010, 2010. Exact figures are national registers' own counts, while figures marked ≈ and est. are Mondonomo’s estimates, counted from our sources and calibrated against those registers; hover one for how far to trust it in that country. A dash means neither exists.

Registers cited: RENAPO — name frequencies (eduardofv dataset); Census Bureau — Surname Frequency 2010; RENAPER — Apellidos (person counts, national); INEC — civil registry names. Figures without a register are Mondonomo estimates; see Methodology.

Country figures for a list of names, at full precision, are available under licence rather than by scraping this table (how that works).

Other names spelled this way(inferred from the name graph)

Trejo is also recorded as 3 other names, grouped separately because the records behind them do not connect to the one described above.

  • English surname14 spellings in the group

    Most recorded in United States, United Kingdom, Canada, Australia

    Languages: English, German, Dutch

    Also written Trëjö, Trèjo, Trejó

  • Indonesian surname3 spellings in the group

    Most recorded in United States, Peru, Spain, Indonesia

    Languages: Indonesian, Malay

    Also written Trëjo

  • Arabic surname3 spellings in the group

    Most recorded in United States, Egypt, Spain, Peru

    Also written Ťřëjő

58 further groups record this spelling and are not listed here.

Grouping is the name graph's, not a register's: two spellings join a group when the evidence links them, so a group is a claim about the records rather than about the people.

Notable people with this name(measured from records)

190019502000Fabiola Trejo, b. 1901Mario Trejo, b. 1926Rubén Trejo, b. 1937Danny Trejo, b. 1944Mario Trejo, b. 1956Alejandro Trejo, b. 1959Lorena Álvarez, b. 1973Óscar Trejo, b. 1988Alan Trejo, b. 1996Christopher Trejo, b. 1999

The ten people covered by the most Wikipedia language editions — a proxy for cross-cultural notability, which favours historical and Western figures over equally prominent contemporary ones — shown by birth year. Source: Wikidata (CC0).

How to address them(machine-generated)

FormalEstimado/a Trejo,Dear Trejo, (English)
InformalEstimado/a Trejo,Hello, (English)

Evidence(measured from records)

Attested in 22 sources across 12 countries.

Official registers attesting Trejo
CountryRegisterYearCountRank
US United StatesCensus Bureau — Surname Frequency 2010201041K#843
US United StatesCensus Bureau — Surname Frequency 2020202040K#850
US United StatesCensus Bureau — Surname Frequency 2000200027K#1,172
AR ArgentinaRENAPER — Apellidos (person counts, national)—18K—
EC EcuadorINEC — civil registry names20244.5K#848
EC EcuadorINEC — Visualizador de Nombres y Apellidos, per-token query API (1900–2024)—4.5K—
MX MexicoRENAPO — name frequencies (eduardofv dataset)—4.5K#85
EC EcuadorINEC — Visualizador de Nombres y Apellidos, per-token query API (1900–2024)1995105—
EC EcuadorINEC — Visualizador de Nombres y Apellidos, per-token query API (1900–2024)201093—
EC EcuadorINEC — Visualizador de Nombres y Apellidos, per-token query API (1900–2024)201190—
EC EcuadorINEC — Visualizador de Nombres y Apellidos, per-token query API (1900–2024)200090—
EC EcuadorINEC — Visualizador de Nombres y Apellidos, per-token query API (1900–2024)200985—

Reference works 3

  • Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
  • Wikipedia surname tokens
  • Wikidata name items (native-script + romanized given/family names)

These works list the name; their figures are licensed and are not reproduced here.

Register rows as of the 2026-10-09 data build.

Frequently asked questions

What does the name Trejo mean, and where does it come from?
Habitational surname borrowed from Spanish Trejo. Recorded by Wiktionary.
How do you pronounce Trejo?
A machine transcription gives /trɛxo/ (IPA) for Spanish.
In which country does Trejo have the most bearers?
In the United States, the national register counted about 41 thousand people named Trejo, more than in any other country we hold, where it is most often spelled trejo.
How common is the name Trejo?
In the United States, the national register counted 41,021 people named Trejo in 2010, about 1 in 8.1 thousand residents.
How common is Trejo compared with other names?
In Mexico, Trejo is the 77th most common surname of 206,803 surnames recorded there.

What do you want to know about Trejo?

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Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/trejo

The payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. It takes a free API key (1,000 requests a day), which returns what this page shows everyone; the full country table, every register citation and the year-by-year series come with a licensed key, as does bulk access.

About this data

measured from records inferred from the name graph machine-generated

These figures come from the data snapshot of and will change as it is rebuilt.

Statistics are aggregated from the Mondonomo name corpus; related names and etymology are inferred from the name graph; pronunciation and any machine-marked transliterations are model-generated. Read how the numbers are made, including their known failure modes, and where the data comes from.

Reference works we consult — surname dictionaries, official name registers, Wikidata and Wiktionary — are named directly, beside the claims they support. The per-country source counts also include datasets of person records: we publish how many there are and their authority tier, but not their names.

Cite this page Mondonomo, “Trejo” — the 77th most common surname in Mexico. Data snapshot 2026-10-10.

See how Trejo parses inside a full name →