Guiĺlermo
given name · Latin script
Recorded for both men and women· direction only, no split published
Guiĺlermo is a given name written in the Latin script, with more bearers in Argentina than in any other country, where it is the 89th most common given name. Recorded meaning: Borrowed from Spanish Guillermo.
- ARArgentina≈1 in 301(inferred from the name graph)
- CLChile≈1 in 459
- PEPeru≈1 in 470
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.
- Argentina (inferred from the name graph)
- #430 (measured from records)
- Sources
- 473 (measured from records)
- ≈1 in 301 (inferred from the name graph)
≈150,000 people, est.
of 15M given names
Highest-authority source
Argentina, est.
measured from records inferred from the name graph
Spellings & scripts(measured from records)
One other spelling is counted as the same name:
Locally spelled Guillermo in AR Argentina, PE Peru, US United States and 4 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)
Borrowed from Spanish Guillermo.
Sources 7
- A concise dictionary of first names
- Dictionary of American Family Names
- Wiktionary
- Diccionario etimológico de nombres propios
- Förnamn i Sverige. Kortfattat namnlexikon
Attested across 28 languages in the etymology graph.
Where in the world(measured from records)
Guiĺlermo 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 | ||||
|---|---|---|---|---|---|---|
| AR Argentina | #89 | ≈150,000 est. | ≈1 in 301 | 1.1K | Guillermo | 189 |
| ES Spain | #102 | 73,808 | 1 in 678 | 74K | Guillermo | 249 |
| CO Colombia | #101 | ≈71,000 est. | ≈1 in 691 | 50 | Guillermo | 185 |
| PE Peru | #58 | ≈68,000 est. | ≈1 in 470 | — | Guillermo | 137 |
| US United States | #807 | 61,844 | 1 in 5.4K | 62K | Guillermo | 473 |
| CL Chile | #52 | ≈40,000 est. | ≈1 in 459 | 120 | Guillermo | 161 |
| PY Paraguay | #981 | ≈14,000 est. | ≈1 in 517 | — | Guillermo | 60 |
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: RENAPER — Apellidos (person counts, national); Census Bureau — First Name Frequency 2020 by sex; SRCEI — Nombres más comunes (guaguas, 1920–2021); INE — Padrón per-token widgets (current living counts, given + apellidos); the co-datosgov-candidates register. 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
- What does the name Guiĺlermo mean, and where does it come from?
- Borrowed from Spanish Guillermo. Recorded by A concise dictionary of first names and Dictionary of American Family Names and 5 other sources.
- Is Guiĺlermo a male or female name?
- Guiĺlermo is a male name in our records. Opposite-gender entries fall within the cross-gender noise we measure in the source data, so we don't report them as usage.
- In which country does Guiĺlermo have the most bearers?
- Mondonomo estimates about 151 thousand people named Guiĺlermo in Argentina, more than in any other country we hold, where it is most often spelled guillermo.
- How common is the name Guiĺlermo?
- In Spain, the national register counted 73,808 people named Guiĺlermo, about 1 in 678 residents.
- How common is Guiĺlermo compared with other names?
- In Argentina, Guiĺlermo is the 89th most common given name of 119,825 given names recorded there.
What do you want to know about Guiĺlermo?
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/gui%C4%BAlermoThe 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, “Guiĺlermo” — the 89th most common given name in Argentina. Data snapshot 2026-10-10.