Guilherme
given name · Latin script
Meaning: a male given name, equivalent to English William
Recorded as a male name· opposite-gender records fall within measured source noise
/ɟiʎɛxmi/(machine-generated) pronunciation, model-generated
Guilherme is a given name written in the Latin script, with more bearers in Brazil than in any other country, where it is the 36th most common given name.
- BRBrazil1 in 313(measured from records)
- PTPortugal≈1 in 422
- AOAngola≈1 in 3K
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.
- Brazil (measured from records)
- Sources
- 288 (measured from records)
- 1 in 313 (inferred from the name graph)
676,181 people, 2022
Highest-authority source
Brazil
measured from records inferred from the name graph
Meaning & origin(measured from records)
a male given name, equivalent to English William
Sources 1
- kaikki.org Wiktionary extract (IPA + transliterations)
Attested across 15 languages in the etymology graph.
Where in the world(measured from records)
Guilherme 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 | ||||
|---|---|---|---|---|---|---|
| BR Brazil | #36 | 676,181 | 1 in 313 | 676K | Guilherme | 257 |
| PT Portugal | #72 | ≈24,000 est. | ≈1 in 422 | 777 | Guilherme | 170 |
| AO Angola | #56 | ≈11,000 est. | ≈1 in 3K | — | Guilherme | 42 |
| US United States | — | 2,595 | 1 in 128K | 2.6K | Guilherme | 288 |
| FR France | — | ≈1,600 est. | ≈1 in 43K | 295 | Guilherme | 5 |
| NO Norway | — | ≈340 est. | ≈1 in 16K | 206 | — | 20 |
| UY Uruguay | #908 | 232 | 1 in 15K | 232 | Guilherme | 20 |
676,181 people counted by IBGE — names by decade (Kaggle mirror), 2022. 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: IBGE — names by decade (Kaggle mirror); Census Bureau — First Name Frequency 2020 by sex; IRN — Nomes próprios mais frequentes (2017–2023); INSEE — Fichier des prénoms (1900–2024); INE Uruguay — Nombres más frecuentes 1902–2024 (Tableau Public); SSB — Navnesøk (name-search service, living population). 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 recorded senses(measured from records)
Guilherme is also recorded in one other lexicon, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
Portuguese form of WILLIAM .
as a word
Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.
Notable people with this name(measured from records)
- Guilherme Boulosb. 1982BRFar-left political activist, Federal Deputy of Brazil since 2023
- Guilherme Alvim Marinatob. 1985BRRussian footballer
- Guilherme Siqueirab. 1986BRBrazilian footballer
- Guilherme Guidob. 1987BRBrazilian swimmer
- Guilherme dos Santos Torresb. 1991BRBrazilian footballer
- Guilherme Clezarb. 1992BRBrazilian tennis player
- Guilherme Neguebab. 1992BRBrazilian footballer
- Pedro Guilherme Abreu dos Santosb. 1997BRBrazilian footballer
- Guilherme Aranab. 1997BRBrazilian association football player
- Igor Paixãob. 2000BRnot in their usual nameBrazilian footballer
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)
A formal English salutation is built on the surname, so it needs a full name — on its own, a first name only supports the informal form.
Evidence(measured from records)
Attested in 64 sources across 31 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2022 | 676K | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 671K | #21 |
| BR Brazil | IBGE — Nomes (census name API) | — | 529K | #70 |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | 2020 | 38K | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 4.8K | #21 |
| US United States | Census Bureau — First Name Frequency 2020 by sex | 2020 | 2.6K | #6,231 |
| PT Portugal | IRN — Nomes próprios mais frequentes (2017–2023) | 2023 | 777 | #16 |
| FR France | INSEE — Fichier des prénoms (1900–2024) | 2022 | 295 | #1,980 |
| UY Uruguay | INE Uruguay — Nombres más frecuentes 1902–2024 (Tableau Public) | — | 232 | — |
| UY Uruguay | INE Uruguay — Nombres más frecuentes 1902–2024 (Tableau Public) | — | 227 | — |
| NO Norway | SSB — Navnesøk (name-search service, living population) | — | 206 | #4,719 |
| US United States | Census Bureau — First Name Frequency 2020 by sex | 2020 | 8 | #6,231 |
Reference works 4
- Dictionary of American Family Names
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- Wikipedia given-name 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
- How do you pronounce Guilherme?
- A machine transcription gives /ɟiʎɛxmi/ (IPA) for Portuguese.
- What does the name Guilherme mean, and where does it come from?
- a male given name, equivalent to English William Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
- What are other forms of the name Guilherme?
- In the etymology graph, William, Guillermo and Willie are forms of the same name in other languages.
- In which country does Guilherme have the most bearers?
- In Brazil, the national register counted about 676 thousand people named Guilherme, more than in any other country we hold, where it is most often spelled guilherme.
- Where is Guilherme most common?
- Guilherme is densest in Brazil, where the national register counts about 1 in 313 people carrying it.
- Is Guilherme a male or female name?
- Guilherme 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.
- How common is the name Guilherme?
- In Brazil, the national register counted 676,181 people named Guilherme in 2022, about 1 in 313 residents.
- How common is Guilherme compared with other names?
- In Brazil, Guilherme is the 36th most common given name of 474,894 given names recorded there.
What do you want to know about Guilherme?
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/guilhermeThe 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, “Guilherme” — the 36th most common given name in Brazil. Data snapshot 2026-10-10.