Àlonzo
surname · Latin script
Àlonzo is a surname written in the Latin script, with more bearers in the United States than in any other country. In Réunion it is the 26th most common surname.
- USUnited States1 in 16K(measured from records)
- ARArgentina1 in 17K
- BRBrazil1 in 840K
carrying the name, as counted by each country's national register. One hue, darker where it is more common; hover a country for its figure.
- United States (measured from records)
- Record sources
- 309 (measured from records)
- 1 in 4.3K (inferred from the name graph)
20,367 people, 2010
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Ecuador
measured from records inferred from the name graph
Spellings & scripts
(measured from records)One other spelling is counted as the same name:
Locally spelled Alonzo in US United States, AR Argentina, EC Ecuador and 3 more.
Spellings marked ● are how people bearing the name write it in our records, and ○ marks a model's transliteration; click a spelling to open its page.
Meaning & origin
(measured from records)VARIANTI:. Alonso, Alonzi; D’Alénzo. 7 Diffuso nel Sud, é un adattamento del nome e cognome spagnolo Alonso, forma popolare, e ormai quasi esclusiva, di Alfonso (y. Alfonsi).
Cited for this meaning 2
- Dizionario dei cognomi italiani
- Dicionário dos sobrenomes italianos
Attested across 20 languages in the etymology graph.
Where in the world
(measured from records)Àlonzo 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.
| Country | Most common spelling | Sources | ||||
|---|---|---|---|---|---|---|
| US United States | — | 20,367 | 1 in 16K | 24K | Alonzo | 309 |
| EC Ecuador | — | 3,935 | 1 in 4.3K | 3.9K | Alonzo | 30 |
| AR Argentina | — | 2,699 | 1 in 17K | 2.7K | Alonzo | 54 |
| ES Spain | — | 893 | 1 in 56K | 893 | Alonzo | 73 |
| BR Brazil | — | 252 | 1 in 840K | 252 | Alonzo | 40 |
| CR Costa Rica | — | 100 | 1 in 51K | 100 | — | 18 |
| GY Guyana | — | 52 | 1 in 14K | 52 | — | — |
| RE Réunion | #26 | — | — | 5 | Alonzo | 6 |
20,367 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: Census Bureau — Surname Frequency 2010; Census Bureau — First Name Frequency 2020 by sex; RENAPER — Apellidos (person counts, national); INEC — civil registry names; IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); INSEE — Fichier des prénoms (births by department), dpt 974 (Réunion); TSE — electoral roll (padrón) names; Guyana — Official List of Electors July 2025. 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).
Evidence
(measured from records)No register attests this spelling yet
Frequently asked questions
- In which country does Àlonzo have the most bearers?
- In the United States, the national register counted about 20 thousand people named Àlonzo, more than in any other country we hold, where it is most often spelled alonzo.
- Where is Àlonzo most common?
- Measured as a share of residents rather than as a count, Àlonzo is densest in Ecuador — about 1 in 4.3 thousand people — even though United States holds more of our records for it.
- How common is the name Àlonzo?
- In the United States, the national register counted 20,367 people named Àlonzo in 2010, about 1 in 16 thousand residents.
- How common is Àlonzo compared with other names?
- In Réunion, Àlonzo is the 26th most common surname of 3,012 surnames recorded there.
What do you want to know about Àlonzo?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/%C3%A0lonzoThe 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, “Àlonzo” — the 26th most common surname in Réunion. Data snapshot 2026-10-13.